{"id":4400,"date":"2023-10-25T18:38:07","date_gmt":"2023-10-25T13:08:07","guid":{"rendered":"https:\/\/python-programs.com\/?p=4400"},"modified":"2023-11-10T11:59:08","modified_gmt":"2023-11-10T06:29:08","slug":"python-while-loop-with-examples","status":"publish","type":"post","link":"https:\/\/python-programs.com\/python-while-loop-with-examples\/","title":{"rendered":"Python: While Loop with Examples"},"content":{"rendered":"<p>While Loops are used in Python to execute a set of statements over and over until a condition is met.. When the condition is met, the line immediately following the loop in the programme is executed. Indefinite iteration is demonstrated by the while loop. The term &#8220;indefinite iteration&#8221; refers to the fact that the number of times the loop is executed is not specified explicitly in advance.<\/p>\n<h2>While Loop in Python<\/h2>\n<ul>\n<li><a>Syntax:<\/a><\/li>\n<li><a href=\"#Working_of_while_loop\">Working of while loop<\/a><\/li>\n<li><a href=\"#Print_first_n_natural_numbers\">Print first n natural numbers<\/a><\/li>\n<li><a href=\"#Multiple_conditions_in_while_loop\">Multiple conditions in while loop<\/a><\/li>\n<li><a href=\"#While_loop_with_else\">While loop with else<\/a><\/li>\n<\/ul>\n<h3 id=\"Syntax:\"><strong>1)Syntax:<\/strong><\/h3>\n<pre>while expression:\r\n    statement(s)<\/pre>\n<h3 id=\"Working_of_while_loop\">2)Working of while loop<\/h3>\n<p>After a programming construct, all statements indented by the same number of character spaces are considered to be part of a single block of code.. Python&#8217;s method of grouping statements is indentation. When a while loop is run, expression is evaluated in a Boolean context and, if true, the loop body is executed. The expression is then checked again, and if it is still true, the body is executed again, and so on until the expression becomes false.<\/p>\n<h3 id=\"Print_first_n_natural_numbers\">3)Print first n natural numbers<\/h3>\n<p>Using while loop to print first n natural numbers. let us take n=15<\/p>\n<p><strong>Below is the implementation:\u00a0<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\"># using while loop to print natural numbers upto n\r\nn = 15\r\n# let us take a temp variable to 1 as natural numbers starts from 1\r\ntemp = 1\r\n# using while loop\r\nwhile(temp &lt;= n):\r\n    # printing temp variable\r\n    print(temp)\r\n    # increment the temp by 1\r\n    temp = temp+1\r\n<\/pre>\n<p><strong>Output:<\/strong><\/p>\n<pre id=\"codeOutputPre\">1\r\n2\r\n3\r\n4\r\n5\r\n6\r\n7\r\n8\r\n9\r\n10\r\n11\r\n12\r\n13\r\n14\r\n15<\/pre>\n<h3 id=\"Multiple_conditions_in_while_loop\">4)Multiple conditions in while loop<\/h3>\n<p>In a while statement, we can have multiple conditions, and we can use \u2018and&#8217; and \u2018or&#8217; with these conditions.<\/p>\n<p><strong>Below is the implementation:\u00a0<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\"># using while loop to print even natural numbers upto n\r\nn = 15\r\n# let us take a temp variable to 2 as natural numbers starts from 2\r\ntemp = 2\r\n# using while loop\r\nwhile(temp &lt;= n and temp % 2 == 0):\r\n    # printing temp variable\r\n    print(temp)\r\n    # increment the temp by 2\r\n    temp = temp+2\r\n<\/pre>\n<p><strong>Output:<\/strong><\/p>\n<pre id=\"codeOutputPre\">2\r\n4\r\n6\r\n8\r\n10\r\n12\r\n14<\/pre>\n<h3 id=\"While_loop_with_else\">5)While loop with else<\/h3>\n<p>In Python, we can have while&#8230;else blocks similar to if&#8230;else blocks, i.e., an else block after a while block.<\/p>\n<p>The while loop will execute statements from the white suite multiple times until the condition is evaluated as False. When the condition in the while statement evaluates to False, control moves to the else block, where all of the statements in the else suite are executed.<\/p>\n<p>Ex: Printing first n natural numbers and printing 0 at last.<\/p>\n<p><strong>Below is the implementation:\u00a0<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\"># using while loop to print natural numbers upto n\r\nn = 10\r\n# let us take a temp variable to 1 as natural numbers starts from 1\r\ntemp = 1\r\n# using while loop\r\nwhile(temp &lt;= n):\r\n    # printing temp variable\r\n    print(temp)\r\n    # increment the temp by 1\r\n    temp = temp+1\r\nelse:\r\n    print(0)\r\n<\/pre>\n<p><strong>Output:<\/strong><\/p>\n<pre id=\"codeOutputPre\">1\r\n2\r\n3\r\n4\r\n5\r\n6\r\n7\r\n8\r\n9\r\n10\r\n0<\/pre>\n<p><strong>Related Programs<\/strong>:<\/p>\n<ul>\n<li><a href=\"https:\/\/python-programs.com\/python-for-loop-explained-with-examples\/\">python for loop explained with examples<\/li>\n<li><a href=\"https:\/\/python-programs.com\/numpy-where-explained-with-examples\/\">numpy where explained with examples<\/li>\n<li><a href=\"https:\/\/python-programs.com\/for-loop-with-2-variables-in-c-and-java\/\">for loop with 2 variables in c and java<\/li>\n<li><a href=\"https:\/\/python-programs.com\/python-map-function-with-examples\/\">python map function with examples<\/li>\n<li><a href=\"https:\/\/python-programs.com\/python-open-a-file-using-open-with-statement-and-benefits-explained-with-examples\/\">python open a file using open with statement and benefits explained with examples<\/li>\n<li><a href=\"https:\/\/python-programs.com\/python-numpy-ravel-function-tutorial-with-examples\/\">python numpy ravel function tutorial with examples<\/li>\n<li><a href=\"https:\/\/python-programs.com\/cpp11-cpp14-delete-keyword-and-deleted-functions-with-use-cases-examples\/\">cpp11 cpp14 delete keyword and deleted functions with use cases examples<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>While Loops are used in Python to execute a set of statements over and over until a condition is met.. When the condition is met, the line immediately following the loop in the programme is executed. Indefinite iteration is demonstrated by the while loop. The term &#8220;indefinite iteration&#8221; refers to the fact that the number &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"https:\/\/python-programs.com\/python-while-loop-with-examples\/\"> <span class=\"screen-reader-text\">Python: While Loop with Examples<\/span> Read More &raquo;<\/a><\/p>\n","protected":false},"author":7,"featured_media":4932,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":"","jetpack_publicize_message":"","jetpack_is_tweetstorm":false,"jetpack_publicize_feature_enabled":true},"categories":[5],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v18.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Python: While Loop with Examples - Python Programs<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/python-programs.com\/python-while-loop-with-examples\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Python: While Loop with Examples - Python Programs\" \/>\n<meta property=\"og:description\" content=\"While Loops are used in Python to execute a set of statements over and over until a condition is met.. When the condition is met, the line immediately following the loop in the programme is executed. Indefinite iteration is demonstrated by the while loop. 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