{"id":5656,"date":"2022-02-13T23:00:00","date_gmt":"2022-02-13T17:30:00","guid":{"rendered":"https:\/\/www.codingbroz.com\/?p=5656"},"modified":"2022-02-13T14:21:31","modified_gmt":"2022-02-13T08:51:31","slug":"cpp-program-to-reverse-a-number","status":"publish","type":"post","link":"https:\/\/www.codingbroz.com\/cpp-program-to-reverse-a-number\/","title":{"rendered":"C++ Program to Reverse a Number"},"content":{"rendered":"\n<p>In this post, we will learn <strong>how to reverse a number using C++<\/strong> Programming language.<\/p>\n\n\n\n<p>This program asks the user to enter an integer, then it reverse the integer using a <strong>while loop<\/strong>.<\/p>\n\n\n\n<p>So, without further ado, let\u2019s begin this tutorial.<\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_65 ez-toc-wrap-left counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<label for=\"ez-toc-cssicon-toggle-item-662c93b592133\" class=\"ez-toc-cssicon-toggle-label\"><label class=\"ez-toc-title\">Table of Contents<\/label>\n<span class=\"ez-toc-cssicon\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #0090ff;color:#0090ff\" 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: #0090ff;color:#0090ff\" 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><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-662c93b592133\" checked \/><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:\/\/www.codingbroz.com\/cpp-program-to-reverse-a-number\/#C_Program_to_Reverse_a_Number\" title=\"C++ Program to Reverse a Number\">C++ Program to Reverse a Number<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.codingbroz.com\/cpp-program-to-reverse-a-number\/#How_Does_This_Program_Work\" title=\"How Does This Program Work ?\">How Does This Program Work ?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.codingbroz.com\/cpp-program-to-reverse-a-number\/#Conclusion\" title=\"Conclusion\">Conclusion<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\" id=\"c-program-to-reverse-a-number\"><span class=\"ez-toc-section\" id=\"C_Program_to_Reverse_a_Number\"><\/span><strong>C++ Program to Reverse a Number<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"cpp\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ C++ Program to Reverse a Number\n#include &lt;iostream>\nusing namespace std;\n\nint main(){\n    int n, rem, reverse_number = 0;\n    \n    \/\/ Asking for input\n    cout &lt;&lt; \"Enter an integer: \";\n    cin >> n;\n    \n    \/\/ Reversing the number\n    while (n != 0){\n        rem = n % 10;\n        reverse_number = reverse_number * 10 + rem;\n        n = n \/ 10;\n    }\n    \n    \/\/ Displaying output\n    cout &lt;&lt; \"Reversed Number: \" &lt;&lt; reverse_number &lt;&lt; endl;\n    return 0;\n}\n<\/pre>\n\n\n\n<p><strong>Output<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Enter an integer: 746\r\nReversed Number: 647\r<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"how-does-this-program-work\"><span class=\"ez-toc-section\" id=\"How_Does_This_Program_Work\"><\/span><strong>How Does This Program Work ?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"cpp\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">    int n, rem, reverse_number = 0;\n<\/pre>\n\n\n\n<p>In this program, we have declared <strong>three integer data type<\/strong> variables named <strong>n<\/strong>, <strong>rem<\/strong> and <strong>reverse_number<\/strong>. <strong>reverse_number<\/strong> variable has assigned a value of <strong>0<\/strong>.<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"cpp\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">    \/\/ Asking for input\n    cout &lt;&lt; \"Enter an integer: \";\n    cin >> n;\n<\/pre>\n\n\n\n<p>The user is asked to enter a number which he wants to reverse. This value gets stored in the &#8216;<strong>n<\/strong>&#8216; named variable.<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"cpp\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">    \/\/ Reversing the number\n    while (n != 0){\n        rem = n % 10;\n        reverse_number = reverse_number * 10 + rem;\n        n = n \/ 10;\n    }\n<\/pre>\n\n\n\n<p>The entered integer gets reversed using a <strong>while loop<\/strong>. Suppose, the user enters an integer <strong>746<\/strong>.<\/p>\n\n\n\n<ul><li><strong>1st While Loop Iteration:<\/strong> while (746 != 0), here the condition is <strong>True<\/strong>, so the loop continues.<ul><li>rem = n % 10 = 746 % 10 = 6<\/li><li>reverse_number = reverse_number * 10 + rem = 0 * 10 + 6 = 0 + 6 = <strong>6<\/strong><\/li><li>n = n \/ 10 = 746 \/ 10 = 74<\/li><\/ul><\/li><\/ul>\n\n\n\n<p>Now, <strong>n<\/strong> becomes <strong>74<\/strong> and <strong>reverse_number<\/strong> becomes <strong>6<\/strong>.<\/p>\n\n\n\n<ul><li><strong>2nd While Loop Iteration:<\/strong> while (74 != 0), here the condition is also <strong>True<\/strong>, so the loop continues.<ul><li>rem = n % 10 = 74 % 10 = 4<\/li><li>reverse_number = reverse_number * 10 + rem = 6 * 10 + 4 = 60 + 4 = <strong>64<\/strong><\/li><li>n = n \/ 10 = 74 \/ 10 = 7<\/li><\/ul><\/li><\/ul>\n\n\n\n<p>Now, the value of <strong>n<\/strong> becomes <strong>7<\/strong> and <strong>reverse_number<\/strong> becomes <strong>64<\/strong>.<\/p>\n\n\n\n<ul><li><strong>3rd While Loop Iteration:<\/strong> while (7 != 0), here the condition is <strong>True<\/strong>, so the loop continues.<ul><li>rem = n % 10 = 7 % 10 = 7<\/li><li>reverse_number = reverse_number * 10 + rem = 64 * 10 + 7 = 640 + 7 = <strong>647<\/strong><\/li><li>n = n \/ 10 = 7 \/ 10 = 0<\/li><\/ul><\/li><\/ul>\n\n\n\n<p>Now, the value of <strong>n<\/strong> becomes <strong>0<\/strong> and <strong>reverse_number<\/strong> becomes <strong>647<\/strong>.<\/p>\n\n\n\n<ul><li><strong>4th While Loop Iteration:<\/strong> while (0 != 0), here the condition is <strong>False<\/strong>, so the loop <strong>terminates<\/strong> and we get <strong>reverse_number = 647<\/strong> which is the reverse of the original number.<\/li><\/ul>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"cpp\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">    \/\/ Displaying output\n    cout &lt;&lt; \"Reversed Number: \" &lt;&lt; reverse_number &lt;&lt; endl;\n<\/pre>\n\n\n\n<p>Then, the reversed number of the entered integer is displayed on the screen using the <strong>cout<\/strong> statement.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"conclusion\"><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span><strong>Conclusion<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>I hope after going through this post, you understand <strong>how to reverse a number using C++<\/strong> Programming language.<\/p>\n\n\n\n<p>If you have any doubt regarding the program, then contact us in the comment section. We will be delighted to assist you.<\/p>\n\n\n\n<p><strong>Also Read:<\/strong><\/p>\n\n\n\n<ul><li><strong><a href=\"https:\/\/www.codingbroz.com\/cpp-program-to-swap-two-numbers\/\">C++ Program to Swap Two Numbers<\/a><\/strong><\/li><li><strong><a href=\"https:\/\/www.codingbroz.com\/cpp-program-to-find-gcd-of-two-numbers\/\">C++ Program to Find GCD of Two Numbers<\/a><\/strong><\/li><li><strong><a href=\"https:\/\/www.codingbroz.com\/cpp-program-to-find-last-digit-of-a-number\/\">C++ Program to Find Last Digit of a Number<\/a><\/strong><\/li><li><strong><a href=\"https:\/\/www.codingbroz.com\/cpp-program-to-display-fibonacci-sequence\/\">C++ Program to Display Fibonacci Sequence<\/a><\/strong><\/li><li><strong><a href=\"https:\/\/www.codingbroz.com\/cpp-program-to-count-number-of-digits-in-a-number\/\">C++ Program to Count Number of Digits in a Number<\/a><\/strong><\/li><\/ul>\n","protected":false},"excerpt":{"rendered":"<p>In this post, we will learn how to reverse a number using C++ Programming language.<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","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":"","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 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