{"id":9574,"date":"2023-05-15T13:36:53","date_gmt":"2023-05-15T08:06:53","guid":{"rendered":"https:\/\/neonpolice.com\/?p=9574"},"modified":"2024-03-27T13:19:28","modified_gmt":"2024-03-27T07:49:28","slug":"python-function","status":"publish","type":"post","link":"https:\/\/neonpolice.com\/fr\/python-function\/","title":{"rendered":"Introduction \u00e0 la fonction Python"},"content":{"rendered":"<p><span style=\"font-weight: 400;\">Python&#8217;s functions are the language&#8217;s underlying structure. They allow for bigger programs to be broken down into smaller, more manageable pieces. They also assist with code reusability, which means that a block of code can be used multiple times without having to rewrite it each time.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">This is another benefit of using modules in <\/span><span style=\"font-weight: 400;\">Datacamp<\/span><span style=\"font-weight: 400;\">. Because Python functions can be called at any place in the program and can also return values, they are extremely versatile tools that can be used to solve a wide variety of complex programming problems.\t\t<div class=\"web-stories-list alignnone has-archive-link is-view-type-circles is-style-default is-carousel\" data-id=\"1\">\n\t\t\t<div\n\t\t\tclass=\"web-stories-list__inner-wrapper carousel-1\"\n\t\t\tstyle=\"--ws-circle-size:100px\"\n\t\t\t>\n\t\t\t\t\t\t\t\t\t<div\n\t\t\t\t\tclass=\"web-stories-list__carousel circles\"\n\t\t\t\t\tdata-id=\"carousel-1\"\n\t\t\t\t\tdata-prev=\"Pr\u00e9c\u00e9dent\"\n\t\t\t\t\tdata-next=\"Suivant\"\n\t\t\t\t\t>\n\t\t\t\t\t\t\t\t\t<div\n\t\t\t\tclass=\"web-stories-list__story\"\n\t\t\t\tdata-wp-interactive=\"web-stories-block\"\n\t\t\t\tdata-wp-context='{\"instanceId\":1}'\t\t\t\tdata-wp-on--click=\"actions.open\"\n\t\t\t\tdata-wp-on-window--popstate=\"actions.onPopstate\"\n\t\t\t\t>\n\t\t\t\t\t\t\t<div class=\"web-stories-list__story-poster\">\n\t\t\t\t<a href=\"https:\/\/neonpolice.com\/fr\/web-stories\/your-ultimate-checklist-of-baby-essentials\/\" >\n\t\t\t\t\t<img\n\t\t\t\t\t\tsrc=\"https:\/\/neonpolice.com\/wp-content\/uploads\/2024\/01\/cropped-baby_essentials_checklist-hero-GettyImages-1413731369.webp\"\n\t\t\t\t\t\talt=\"Your Ultimate Checklist of Baby Essentials\"\n\t\t\t\t\t\twidth=\"185\"\n\t\t\t\t\t\theight=\"308\"\n\t\t\t\t\t\t\t\t\t\t\t\t\tsrcset=\"https:\/\/neonpolice.com\/wp-content\/uploads\/2024\/01\/cropped-baby_essentials_checklist-hero-GettyImages-1413731369.webp 640w, https:\/\/neonpolice.com\/wp-content\/uploads\/2024\/01\/cropped-baby_essentials_checklist-hero-GettyImages-1413731369-225x300.webp 225w, https:\/\/neonpolice.com\/wp-content\/uploads\/2024\/01\/cropped-baby_essentials_checklist-hero-GettyImages-1413731369-585x780.webp 585w, https:\/\/neonpolice.com\/wp-content\/uploads\/2024\/01\/cropped-baby_essentials_checklist-hero-GettyImages-1413731369-150x200.webp 150w\"\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tsizes=\"auto, (max-width: 640px) 100vw, 640px\"\n\t\t\t\t\t\t\t\t\t\t\t\tloading=\"lazy\"\n\t\t\t\t\t\tdecoding=\"async\"\n\t\t\t\t\t>\n\t\t\t\t<\/a>\n\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<div\n\t\t\t\tclass=\"web-stories-list__story\"\n\t\t\t\tdata-wp-interactive=\"web-stories-block\"\n\t\t\t\tdata-wp-context='{\"instanceId\":1}'\t\t\t\tdata-wp-on--click=\"actions.open\"\n\t\t\t\tdata-wp-on-window--popstate=\"actions.onPopstate\"\n\t\t\t\t>\n\t\t\t\t\t\t\t<div class=\"web-stories-list__story-poster\">\n\t\t\t\t<a href=\"https:\/\/neonpolice.com\/fr\/web-stories\/youll-absolutely-love-these-moisturizers-for-dry-skin\/\" >\n\t\t\t\t\t<img\n\t\t\t\t\t\tsrc=\"https:\/\/neonpolice.com\/wp-content\/uploads\/2022\/10\/cropped-3-23.webp\"\n\t\t\t\t\t\talt=\"YOU\u2019LL ABSOLUTELY LOVE THESE MOISTURIZERS FOR DRY SKIN\"\n\t\t\t\t\t\twidth=\"185\"\n\t\t\t\t\t\theight=\"308\"\n\t\t\t\t\t\t\t\t\t\t\t\t\tsrcset=\"https:\/\/neonpolice.com\/wp-content\/uploads\/2022\/10\/cropped-3-23.webp 640w, https:\/\/neonpolice.com\/wp-content\/uploads\/2022\/10\/cropped-3-23-225x300.webp 225w, https:\/\/neonpolice.com\/wp-content\/uploads\/2022\/10\/cropped-3-23-585x780.webp 585w, https:\/\/neonpolice.com\/wp-content\/uploads\/2022\/10\/cropped-3-23-150x200.webp 150w\"\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tsizes=\"auto, (max-width: 640px) 100vw, 640px\"\n\t\t\t\t\t\t\t\t\t\t\t\tloading=\"lazy\"\n\t\t\t\t\t\tdecoding=\"async\"\n\t\t\t\t\t>\n\t\t\t\t<\/a>\n\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<div\n\t\t\t\tclass=\"web-stories-list__story\"\n\t\t\t\tdata-wp-interactive=\"web-stories-block\"\n\t\t\t\tdata-wp-context='{\"instanceId\":1}'\t\t\t\tdata-wp-on--click=\"actions.open\"\n\t\t\t\tdata-wp-on-window--popstate=\"actions.onPopstate\"\n\t\t\t\t>\n\t\t\t\t\t\t\t<div class=\"web-stories-list__story-poster\">\n\t\t\t\t<a href=\"https:\/\/neonpolice.com\/fr\/web-stories\/top-18-white-sneakers-for-women\/\" >\n\t\t\t\t\t<img\n\t\t\t\t\t\tsrc=\"https:\/\/neonpolice.com\/wp-content\/uploads\/2022\/10\/cropped-10-2.webp\"\n\t\t\t\t\t\talt=\"WHITE SNEAKERS FOR WOMEN\"\n\t\t\t\t\t\twidth=\"185\"\n\t\t\t\t\t\theight=\"308\"\n\t\t\t\t\t\t\t\t\t\t\t\t\tsrcset=\"https:\/\/neonpolice.com\/wp-content\/uploads\/2022\/10\/cropped-10-2.webp 640w, https:\/\/neonpolice.com\/wp-content\/uploads\/2022\/10\/cropped-10-2-225x300.webp 225w, https:\/\/neonpolice.com\/wp-content\/uploads\/2022\/10\/cropped-10-2-585x780.webp 585w, https:\/\/neonpolice.com\/wp-content\/uploads\/2022\/10\/cropped-10-2-150x200.webp 150w\"\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tsizes=\"auto, (max-width: 640px) 100vw, 640px\"\n\t\t\t\t\t\t\t\t\t\t\t\tloading=\"lazy\"\n\t\t\t\t\t\tdecoding=\"async\"\n\t\t\t\t\t>\n\t\t\t\t<\/a>\n\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<div\n\t\t\t\tclass=\"web-stories-list__story\"\n\t\t\t\tdata-wp-interactive=\"web-stories-block\"\n\t\t\t\tdata-wp-context='{\"instanceId\":1}'\t\t\t\tdata-wp-on--click=\"actions.open\"\n\t\t\t\tdata-wp-on-window--popstate=\"actions.onPopstate\"\n\t\t\t\t>\n\t\t\t\t\t\t\t<div class=\"web-stories-list__story-poster\">\n\t\t\t\t<a href=\"https:\/\/neonpolice.com\/fr\/web-stories\/what-clothing-brands-do-kids-like\/\" >\n\t\t\t\t\t<img\n\t\t\t\t\t\tsrc=\"https:\/\/neonpolice.com\/wp-content\/uploads\/2022\/10\/cropped-Untitled-design-8.webp\"\n\t\t\t\t\t\talt=\"WHAT CLOTHING BRANDS DO KIDS LIKE?\"\n\t\t\t\t\t\twidth=\"185\"\n\t\t\t\t\t\theight=\"308\"\n\t\t\t\t\t\t\t\t\t\t\t\t\tsrcset=\"https:\/\/neonpolice.com\/wp-content\/uploads\/2022\/10\/cropped-Untitled-design-8.webp 640w, https:\/\/neonpolice.com\/wp-content\/uploads\/2022\/10\/cropped-Untitled-design-8-225x300.webp 225w, https:\/\/neonpolice.com\/wp-content\/uploads\/2022\/10\/cropped-Untitled-design-8-585x780.webp 585w, https:\/\/neonpolice.com\/wp-content\/uploads\/2022\/10\/cropped-Untitled-design-8-150x200.webp 150w\"\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tsizes=\"auto, (max-width: 640px) 100vw, 640px\"\n\t\t\t\t\t\t\t\t\t\t\t\tloading=\"lazy\"\n\t\t\t\t\t\tdecoding=\"async\"\n\t\t\t\t\t>\n\t\t\t\t<\/a>\n\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<div\n\t\t\t\tclass=\"web-stories-list__story\"\n\t\t\t\tdata-wp-interactive=\"web-stories-block\"\n\t\t\t\tdata-wp-context='{\"instanceId\":1}'\t\t\t\tdata-wp-on--click=\"actions.open\"\n\t\t\t\tdata-wp-on-window--popstate=\"actions.onPopstate\"\n\t\t\t\t>\n\t\t\t\t\t\t\t<div class=\"web-stories-list__story-poster\">\n\t\t\t\t<a href=\"https:\/\/neonpolice.com\/fr\/web-stories\/ways-to-reuse-your-wedding-dresses\/\" >\n\t\t\t\t\t<img\n\t\t\t\t\t\tsrc=\"https:\/\/neonpolice.com\/wp-content\/uploads\/2023\/10\/cropped-wedding-dress-640x853.jpg\"\n\t\t\t\t\t\talt=\"Ways To Reuse Your Wedding Dresses\"\n\t\t\t\t\t\twidth=\"185\"\n\t\t\t\t\t\theight=\"308\"\n\t\t\t\t\t\t\t\t\t\t\t\t\tsrcset=\"https:\/\/neonpolice.com\/wp-content\/uploads\/2023\/10\/cropped-wedding-dress.jpg 640w, https:\/\/neonpolice.com\/wp-content\/uploads\/2023\/10\/cropped-wedding-dress-225x300.jpg 225w, https:\/\/neonpolice.com\/wp-content\/uploads\/2023\/10\/cropped-wedding-dress-9x12.jpg 9w, https:\/\/neonpolice.com\/wp-content\/uploads\/2023\/10\/cropped-wedding-dress-585x780.jpg 585w, https:\/\/neonpolice.com\/wp-content\/uploads\/2023\/10\/cropped-wedding-dress-150x200.jpg 150w\"\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tsizes=\"auto, (max-width: 640px) 100vw, 640px\"\n\t\t\t\t\t\t\t\t\t\t\t\tloading=\"lazy\"\n\t\t\t\t\t\tdecoding=\"async\"\n\t\t\t\t\t>\n\t\t\t\t<\/a>\n\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<div tabindex=\"0\" aria-label=\"Pr\u00e9c\u00e9dent\" class=\"glider-prev\"><\/div>\n\t\t\t\t\t<div tabindex=\"0\" aria-label=\"Suivant\" class=\"glider-next\"><\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t<\/span><\/p>\n<hr \/>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_88 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/neonpolice.com\/fr\/python-function\/#Defining_a_Python_Function\" >Defining a Python Function<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/neonpolice.com\/fr\/python-function\/#Function_Parameters_and_Arguments\" >Function Parameters and Arguments<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/neonpolice.com\/fr\/python-function\/#Calling_a_Python_Function\" >Calling a Python Function<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/neonpolice.com\/fr\/python-function\/#Returning_Values_from_a_Python_Function\" >Returning Values from a Python Function<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/neonpolice.com\/fr\/python-function\/#What_is_the_built-in_Python_function\" >What is the built-in Python function?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/neonpolice.com\/fr\/python-function\/#Definition\" >Definition<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/neonpolice.com\/fr\/python-function\/#Why_are_Built-in_Functions_Important\" >Why are Built-in Functions Important?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/neonpolice.com\/fr\/python-function\/#Conclusion\" >Conclusion<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/neonpolice.com\/fr\/python-function\/#FAQs\" >FAQs<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Defining_a_Python_Function\"><\/span><span style=\"font-weight: 400;\">Defining a Python Function<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<div id=\"attachment_9592\" style=\"width: 910px\" class=\"wp-caption alignnone\"><img fetchpriority=\"high\" decoding=\"async\" aria-describedby=\"caption-attachment-9592\" class=\"size-full wp-image-9592\" src=\"https:\/\/neonpolice.com\/wp-content\/uploads\/2023\/05\/Untitled-design-2023-05-15T133254.785_11zon.jpg\" alt=\"Defining a Python Function\" width=\"900\" height=\"500\" srcset=\"https:\/\/neonpolice.com\/wp-content\/uploads\/2023\/05\/Untitled-design-2023-05-15T133254.785_11zon.jpg 900w, https:\/\/neonpolice.com\/wp-content\/uploads\/2023\/05\/Untitled-design-2023-05-15T133254.785_11zon-300x167.jpg 300w, https:\/\/neonpolice.com\/wp-content\/uploads\/2023\/05\/Untitled-design-2023-05-15T133254.785_11zon-768x427.jpg 768w, https:\/\/neonpolice.com\/wp-content\/uploads\/2023\/05\/Untitled-design-2023-05-15T133254.785_11zon-18x10.jpg 18w, https:\/\/neonpolice.com\/wp-content\/uploads\/2023\/05\/Untitled-design-2023-05-15T133254.785_11zon-585x325.jpg 585w, https:\/\/neonpolice.com\/wp-content\/uploads\/2023\/05\/Untitled-design-2023-05-15T133254.785_11zon-150x83.jpg 150w\" sizes=\"(max-width: 900px) 100vw, 900px\" \/><p id=\"caption-attachment-9592\" class=\"wp-caption-text\">Defining a Python Function | neonpolice<\/p><\/div>\n<p><span style=\"font-weight: 400;\">A function can be defined in Python by beginning with the &#8220;def&#8221; keyword, then following it with the function&#8217;s name, and ending with a pair of parentheses. It is possible for the parentheses to contain parameters that are not required for the function to carry out its work. The body of the function is indented, and it may contain any number of statements\u2014including conditional statements,<a href=\"https:\/\/neonpolice.com\/acwb\" target=\"_blank\" rel=\"nofollow noopener sponsored\"> loops, and other functions<\/a>\u2014as well as any other kind of statement.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">The following is an illustration of a straightforward Python procedure that outputs a message:<\/span><\/p>\n<p><span style=\"font-weight: 400;\">def print_message():<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u00a0\u00a0\u00a0\u00a0print(&#8220;Hello, world!&#8221;)<\/span><\/p>\n<p><span style=\"font-weight: 400;\">In this example, we defined a function called &#8220;print_message&#8221; that doesn&#8217;t take any arguments and simply prints the message &#8220;Hello, world!&#8221; when called.<\/span><\/p>\n<hr \/>\n<h2><span class=\"ez-toc-section\" id=\"Function_Parameters_and_Arguments\"><\/span><span style=\"font-weight: 400;\">Function Parameters and Arguments<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Python functions have the ability to <a href=\"https:\/\/neonpolice.com\/acwb\" target=\"_blank\" rel=\"nofollow noopener sponsored\">take one or more parameters<\/a>, which are essentially data stubs that stand in for information that the function requires in order to carry out its purpose. The values that are passed to the parameters of a function are referred to as its arguments when the function is invoked. Both the parameters and the arguments can be of any data format, such as strings, integers, floats, or even something completely different.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">The following is an illustration of a <a href=\"https:\/\/neonpolice.com\/acwb\" target=\"_blank\" rel=\"nofollow noopener sponsored\">Python function that receives<\/a> two parameters and outputs the sum of those parameters:<\/span><\/p>\n<p><span style=\"font-weight: 400;\">def add_numbers(x, y):<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u00a0\u00a0\u00a0\u00a0return x + y<\/span><\/p>\n<p><span style=\"font-weight: 400;\">The &#8220;add_numbers&#8221; method shown here accepts the values &#8220;x&#8221; and &#8220;y&#8221; as its input arguments. The function body returns the sum of these two parameters.<\/span><\/p>\n<hr \/>\n<h2><span class=\"ez-toc-section\" id=\"Calling_a_Python_Function\"><\/span><span style=\"font-weight: 400;\">Calling a Python Function<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">To call a Python function, we simply <a href=\"https:\/\/neonpolice.com\/acwb\" target=\"_blank\" rel=\"nofollow noopener sponsored\">use the function name followed<\/a> by parentheses. If the function takes arguments, we pass them inside the parentheses.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Here&#8217;s an example of calling the &#8220;print_message&#8221; function we defined earlier:<\/span><\/p>\n<p><span style=\"font-weight: 400;\">print_message()<\/span><\/p>\n<p><span style=\"font-weight: 400;\">When we call this function, it will print the message &#8220;Hello, world!&#8221; to the console.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Here&#8217;s an example of calling the &#8220;add_numbers&#8221; function with arguments:<\/span><\/p>\n<p><span style=\"font-weight: 400;\">result = add_numbers(3, 5)<\/span><\/p>\n<p><span style=\"font-weight: 400;\">print(result)<\/span><\/p>\n<p><span style=\"font-weight: 400;\">In this example, we called the &#8220;add_numbers&#8221; function with the arguments 3 and 5. The function returned their sum, which we stored in a variable called &#8220;result&#8221;. Our next step was to output the number of &#8220;results&#8221; to the console.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Returning_Values_from_a_Python_Function\"><\/span><span style=\"font-weight: 400;\">Returning Values from a Python Function<\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Python functions can also <a href=\"https:\/\/neonpolice.com\/acwb\" target=\"_blank\" rel=\"nofollow noopener sponsored\">return values using<\/a> the &#8220;return&#8221; keyword. When a function returns a value, it can be assigned to a variable or used in any other way that a value of that data type can be used.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Here&#8217;s an example of a Python function that returns the square of a number:<\/span><\/p>\n<p><span style=\"font-weight: 400;\">def square(x):<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u00a0\u00a0\u00a0\u00a0return x **\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">In this example, we defined a function called &#8220;square&#8221; that takes one parameter, &#8220;x&#8221;. The function body returns the square of &#8220;x&#8221;.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">We can call this function and <a href=\"https:\/\/neonpolice.com\/acwb\" target=\"_blank\" rel=\"nofollow noopener sponsored\">assign its return<\/a> value to a variable like this:<\/span><\/p>\n<p><span style=\"font-weight: 400;\">result = square(4)<\/span><\/p>\n<p><span style=\"font-weight: 400;\">print(result)<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span style=\"font-weight: 400;\">In this example, we called the &#8220;square&#8221; function with the argument 4. The function returned the square of 4 (which is 16), which we stored in a variable called &#8220;result&#8221;. Following that, we output to the console the number that was stored in the &#8220;result&#8221; variable.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"What_is_the_built-in_Python_function\"><\/span><span style=\"font-weight: 400;\">What is the built-in Python function?<\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<div id=\"attachment_9600\" style=\"width: 910px\" class=\"wp-caption alignnone\"><img decoding=\"async\" aria-describedby=\"caption-attachment-9600\" class=\"size-full wp-image-9600\" src=\"https:\/\/neonpolice.com\/wp-content\/uploads\/2023\/05\/Untitled-design-2023-05-15T133454.794_11zon.jpg\" alt=\"What is the built-in Python function?\" width=\"900\" height=\"500\" srcset=\"https:\/\/neonpolice.com\/wp-content\/uploads\/2023\/05\/Untitled-design-2023-05-15T133454.794_11zon.jpg 900w, https:\/\/neonpolice.com\/wp-content\/uploads\/2023\/05\/Untitled-design-2023-05-15T133454.794_11zon-300x167.jpg 300w, https:\/\/neonpolice.com\/wp-content\/uploads\/2023\/05\/Untitled-design-2023-05-15T133454.794_11zon-768x427.jpg 768w, https:\/\/neonpolice.com\/wp-content\/uploads\/2023\/05\/Untitled-design-2023-05-15T133454.794_11zon-18x10.jpg 18w, https:\/\/neonpolice.com\/wp-content\/uploads\/2023\/05\/Untitled-design-2023-05-15T133454.794_11zon-585x325.jpg 585w, https:\/\/neonpolice.com\/wp-content\/uploads\/2023\/05\/Untitled-design-2023-05-15T133454.794_11zon-150x83.jpg 150w\" sizes=\"(max-width: 900px) 100vw, 900px\" \/><p id=\"caption-attachment-9600\" class=\"wp-caption-text\">What is the built-in Python function | neonpolice<\/p><\/div>\n<p><span style=\"font-weight: 400;\">Python is a high-level programming language that can be interpreted and comes with a large number of built-in functions. These functions have already been declared and defined, so a Python application does not need to make any additional declarations or modifications before using them. Programming is made more user-friendly, effective, and enjoyable thanks to Python&#8217;s built-in functions, which are an<a href=\"https:\/\/neonpolice.com\/acwb\" target=\"_blank\" rel=\"nofollow noopener sponsored\"> important component<\/a> of the Python programming language.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Definition\"><\/span><span style=\"font-weight: 400;\">Definition<\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Built-in functions in Python are those functions that are included in the standard package that comes with the programming language. <a href=\"https:\/\/neonpolice.com\/acwb\" target=\"_blank\" rel=\"nofollow noopener sponsored\">These functions have already been specified<\/a> and can be used in a program without the need for any additional import statements or library installations because they are predefined functions.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">The purpose of a program&#8217;s built-in functions is to provide frequently used functionalities that are necessary for the majority of programs. The functionality of these functions has been fine-tuned, and they have been implemented entirely in C or Python, which makes them incredibly quick and effective.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Why_are_Built-in_Functions_Important\"><\/span><span style=\"font-weight: 400;\">Why are Built-in Functions Important?<\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">In <a href=\"https:\/\/en.wikipedia.org\/w\/index.php?search=python+function&amp;title=Special%3ASearch&amp;ns0=1\" target=\"_blank\" rel=\"noopener\">Python programming,<\/a> built-in functions are very essential for a number of different reasons. To begin, they reduce the amount of time and effort required to accomplish a task by offering pre-defined functionality. This functionality can be used immediately within a program without the need for any previous declaration or definition.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">The second advantage of<a href=\"https:\/\/neonpolice.com\/acwb\" target=\"_blank\" rel=\"nofollow noopener sponsored\"> using built-in functions is that<\/a>, because they have already been optimized for performance, they can be called much more quickly than user-defined functions. This is because C or Python itself is used to construct built-in functions, which results in the functions having a higher level of efficiency.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Last but not least, built-in functions offer a consistent method of completing frequently performed duties, which makes the code more readable and straightforward to comprehend. This is due to the fact that built-in functions have standardized titles and syntax, which makes it simpler to identify them and put them to use.<\/span><\/p>\n<hr \/>\n<h2><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span><span style=\"font-weight: 400;\">Conclusion<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">In a nutshell, <a href=\"https:\/\/neonpolice.com\/acwb\" target=\"_blank\" rel=\"nofollow noopener sponsored\">Python functions provide programmers<\/a> with a wide variety of advantages. Large programs can be broken down into smaller, more manageable portions using them, which makes it much simpler to maintain and update the code. In addition to this, functions make it possible to reuse code, which, over the course of a project, can save a substantial amount of time and effort. For more information, visit <a href=\"https:\/\/neonpolice.com\/\" target=\"_blank\" rel=\"noopener\">Neonpolice.<\/a><\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"FAQs\"><\/span><span style=\"font-weight: 400;\">FAQs<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<div class=\"su-accordion su-u-trim\"><div class=\"su-spoiler su-spoiler-style-default su-spoiler-icon-plus su-spoiler-closed\" data-scroll-offset=\"0\" data-anchor-in-url=\"no\"><div class=\"su-spoiler-title\" tabindex=\"0\" role=\"button\"><span class=\"su-spoiler-icon\"><\/span>Python's four function types?<\/div><div class=\"su-spoiler-content su-u-clearfix su-u-trim\">\n<p>Built-in Functions: These are functions that are already present in the Python programming language and can be used at any time. Examples include print(), len(), min(), max(), etc.<br \/>\nUser-defined Functions: These are functions that are specified by the user and are able to be utilized to carry out a particular activity.<br \/>\nLambda Functions are anonymous functions that are created without having a name associated with them. They are typically put to use in circumstances in which a function is only called upon once.<br \/>\nRecursive Functions: These are functions that call themselves, which enables them to repeat a work until a specific condition is met. Recursive functions are also known as self-calling functions. Examples include factorials and Fibonacci numbers.<\/p>\n<\/div><\/div> <div class=\"su-spoiler su-spoiler-style-default su-spoiler-icon-plus su-spoiler-closed\" data-scroll-offset=\"0\" data-anchor-in-url=\"no\"><div class=\"su-spoiler-title\" tabindex=\"0\" role=\"button\"><span class=\"su-spoiler-icon\"><\/span>What is a function in Python?<\/div><div class=\"su-spoiler-content su-u-clearfix su-u-trim\">\n<p>A function is a discrete portion of code in the Python programming language that can be called multiple times to carry out the same operation. By utilizing functions in your program, you can increase its flexibility as well as its potential for reuse.\u00a0 Python not only comes pre-loaded with a ton of helpful functions like print() and others, but it also gives you the ability to create your own. User-defined functions are the name given to these kinds of functions.<\/p>\n<p>Give an example of what a function is in Python.<\/p>\n<p>In Python, a function is a block of code that does a certain job and gives a result. Functions help to make code more organized and easier to read.<\/p>\n<p>An example of a function in Python is the following:<\/p>\n<p>def double_number(x):<\/p>\n<p>return x * 2<\/p>\n<p>This function takes in a single argument (x) and returns the result of that argument multiplied by 2.<\/p>\n<\/div><\/div> <div class=\"su-spoiler su-spoiler-style-default su-spoiler-icon-plus su-spoiler-closed\" data-scroll-offset=\"0\" data-anchor-in-url=\"no\"><div class=\"su-spoiler-title\" tabindex=\"0\" role=\"button\"><span class=\"su-spoiler-icon\"><\/span>How to write a Python function?<\/div><div class=\"su-spoiler-content su-u-clearfix su-u-trim\">A Python function is a block of code that can be used more than once to do a certain task. To write the function, you will need to define a function name, specify the parameters it takes, and the code block within the function that will execute when it is called.Here is an example of a simple Python function that takes two parameters, adds them together, and returns the result:<\/div><\/div><\/div>\n<p><script type=\"application\/ld+json\">\n{\n  \"@context\": \"https:\/\/schema.org\/\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Python's four function types?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Built-in Functions: These are functions that are already present in the Python programming language and can be used at any time. Examples include print(), len(), min(), max(), etc. User-defined Functions: These are functions that are specified by the user and are able to be utilized to carry out a particular activity. Lambda Functions are anonymous functions that are created without having a name associated with them. They are typically put to use in circumstances in which a function is only called upon once. Recursive Functions: These are functions that call themselves, which enables them to repeat a work until a specific condition is met. Recursive functions are also known as self-calling functions. Examples include factorials and Fibonacci numbers.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is a function in Python?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"A function is a discrete portion of code in the Python programming language that can be called multiple times to carry out the same operation. By utilizing functions in your program, you can increase its flexibility as well as its potential for reuse.\u00a0 Python not only comes pre-loaded with a ton of helpful functions like print() and others, but it also gives you the ability to create your own. User-defined functions are the name given to these kinds of functions.  Give an example of what a function is in Python.  In Python, a function is a block of code that does a certain job and gives a result. Functions help to make code more organized and easier to read.  An example of a function in Python is the following:  def double_number(x):  \u00a0\u00a0\u00a0\u00a0return x * 2  This function takes in a single argument (x) and returns the result of that argument multiplied by 2.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How to write a Python function?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"A Python function is a block of code that can be used more than once to do a certain task. To write the function, you will need to define a function name, specify the parameters it takes, and the code block within the function that will execute when it is called. Here is an example of a simple Python function that takes two parameters, adds them together, and returns the result:\"\n      }\n    }\n  ]\n}\n<\/script><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Les fonctions de Python constituent la structure sous-jacente du langage. Ils permettent de diviser des programmes plus importants en \u00e9l\u00e9ments plus petits et plus faciles \u00e0 g\u00e9rer. Ils contribuent \u00e9galement \u00e0 la r\u00e9utilisabilit\u00e9 du code, ce qui signifie que\u2026<\/p>","protected":false},"author":2,"featured_media":9590,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_members_access_role":[],"_members_access_error":""},"categories":[252,1016],"tags":[632],"class_list":["post-9574","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technology","category-datacamp","tag-python-function"],"_links":{"self":[{"href":"https:\/\/neonpolice.com\/fr\/wp-json\/wp\/v2\/posts\/9574","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/neonpolice.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/neonpolice.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/neonpolice.com\/fr\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/neonpolice.com\/fr\/wp-json\/wp\/v2\/comments?post=9574"}],"version-history":[{"count":0,"href":"https:\/\/neonpolice.com\/fr\/wp-json\/wp\/v2\/posts\/9574\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/neonpolice.com\/fr\/wp-json\/wp\/v2\/media\/9590"}],"wp:attachment":[{"href":"https:\/\/neonpolice.com\/fr\/wp-json\/wp\/v2\/media?parent=9574"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/neonpolice.com\/fr\/wp-json\/wp\/v2\/categories?post=9574"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/neonpolice.com\/fr\/wp-json\/wp\/v2\/tags?post=9574"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}