{"id":187599,"date":"2025-02-05T10:24:59","date_gmt":"2025-02-05T10:24:59","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=187599"},"modified":"2025-02-05T10:25:02","modified_gmt":"2025-02-05T10:25:02","slug":"python-5-2-2-basic-while-loop-with-user-input","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/02\/05\/python-5-2-2-basic-while-loop-with-user-input\/","title":{"rendered":"Python 5.2.2: Basic while loop with user input"},"content":{"rendered":"\n

?Python 5.2.2: Basic while loop with user input.<\/p>\n\n\n\n

Write an expression that executes the loop body as long as the user enters a non-negative number.<\/p>\n\n\n\n

Note: If the submitted code has an infinite loop, the system will stop running the code after a few seconds and report “Program end never reached.” The system doesn’t print the test case that caused the reported message.<\/p>\n\n\n\n

Sample outputs with inputs: 9 5 2 -1<\/p>\n\n\n\n

Body<\/p>\n\n\n\n

Body<\/p>\n\n\n\n

Body<\/p>\n\n\n\n

Done<\/p>\n\n\n\n

The Correct Answer and Explanation is :<\/strong><\/mark><\/p>\n\n\n\n

Correct Answer:<\/h3>\n\n\n\n
# Get the first user input\nnum = int(input())\n\n# Loop runs as long as the number is non-negative\nwhile num >= 0:\n    print(\"Body\")\n    num = int(input())  # Get the next input\n\nprint(\"Done\")<\/code><\/pre>\n\n\n\n
\n\n\n\n
Explanation (300 Words)<\/h3>\n\n\n\n
A while loop<\/strong> in Python executes a block of code as long as a specified condition evaluates to True<\/code>. In this case, we want the loop to continue running as long as the user enters a non-negative number (0 or positive values).<\/strong> The moment a negative number is entered, the loop should stop.<\/p>\n\n\n\n
Step-by-Step Breakdown:<\/h4>\n\n\n\n
    \n
  1. Getting User Input:<\/strong>
    The first input is obtained using input()<\/code>, and it’s converted to an integer using int()<\/code>. This ensures that the program processes numerical values rather than string inputs.<\/li>\n\n\n\n
  2. Loop Condition (while num >= 0<\/code>):<\/strong><\/li>\n<\/ol>\n\n\n\n
      \n
    • The condition num >= 0<\/code> ensures that the loop continues as long as the entered number is not negative<\/strong>.<\/li>\n\n\n\n
    • If the user enters -1<\/code> or any other negative number, the condition evaluates to False<\/code>, and the loop stops.<\/li>\n<\/ul>\n\n\n\n
        \n
      1. Printing “Body”:<\/strong><\/li>\n<\/ol>\n\n\n\n
          \n
        • Inside the loop, the statement print(\"Body\")<\/code> executes, indicating that the loop body has been processed.<\/li>\n<\/ul>\n\n\n\n
            \n
          1. Getting the Next Input:<\/strong><\/li>\n<\/ol>\n\n\n\n
              \n
            • After printing “Body”, the program asks for another input using num = int(input())<\/code>.<\/li>\n\n\n\n
            • This ensures that each time the user enters a non-negative number, the loop continues.<\/li>\n<\/ul>\n\n\n\n
                \n
              1. Exiting the Loop:<\/strong><\/li>\n<\/ol>\n\n\n\n
                  \n
                • When the user enters a negative number, the loop condition fails.<\/li>\n\n\n\n
                • The program exits the loop and executes print(\"Done\")<\/code>, signaling that the loop has terminated.<\/li>\n<\/ul>\n\n\n\n
                  Sample Run:<\/h4>\n\n\n\n
                  Input: 9  \nOutput: Body  \nInput: 5  \nOutput: Body  \nInput: 2  \nOutput: Body  \nInput: -1  \nOutput: Done<\/code><\/pre>\n\n\n\n
                  This ensures that the program does not enter an infinite loop<\/strong> and properly stops when a negative number is encountered.<\/p>\n","protected":false},"excerpt":{"rendered":"
                  ?Python 5.2.2: Basic while loop with user input. Write an expression that executes the loop body as long as the user enters a non-negative number. Note: If the submitted code has an infinite loop, the system will stop running the code after a few seconds and report “Program end never reached.” The system doesn’t print […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-187599","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/187599","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=187599"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/187599\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=187599"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=187599"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=187599"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}