{"id":5224,"date":"2022-01-15T23:05:00","date_gmt":"2022-01-15T17:35:00","guid":{"rendered":"https:\/\/www.codingbroz.com\/?p=5224"},"modified":"2022-01-15T10:46:50","modified_gmt":"2022-01-15T05:16:50","slug":"java-program-to-reverse-a-number","status":"publish","type":"post","link":"https:\/\/www.codingbroz.com\/java-program-to-reverse-a-number\/","title":{"rendered":"Java Program to Reverse a Number"},"content":{"rendered":"\n<p> In this post, we will know <strong>how to reverse a number Using Java <\/strong>Programming language. Let&#8217;s see the Java Program to reverse a number.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/www.codingbroz.com\/wp-content\/uploads\/2022\/01\/java-reverse-number.png\" alt=\"Java program to reverse a number\" class=\"wp-image-5225\" srcset=\"https:\/\/www.codingbroz.com\/wp-content\/uploads\/2022\/01\/java-reverse-number.png 1200w, https:\/\/www.codingbroz.com\/wp-content\/uploads\/2022\/01\/java-reverse-number-768x432.png 768w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p>Reverse a number means interchanging the digit of the number like 1st digit is swapped with the last digit, 2nd digit is swapped with second last digit and so on. <\/p>\n\n\n\n<p>For example, if the number given is<strong> 12345, <\/strong>then after reverse, it will become <strong>54321.<\/strong><\/p>\n\n\n\n<p>Now, let&#8217;s straight get into the code of Java Program to reverse a number.<\/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-662d1229c44c0\" 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-662d1229c44c0\" 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\/java-program-to-reverse-a-number\/#Java_Program_To_Reverse_a_Number\" title=\"Java Program To Reverse a Number \">Java 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\/java-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\/java-program-to-reverse-a-number\/#Conclusion\" title=\"Conclusion\">Conclusion<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Java_Program_To_Reverse_a_Number\"><\/span><strong>Java Program To Reverse a Number<\/strong> <span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"java\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">import java.util.*;\n   \n   public class Main{\n   \n   public static void main(String[] args) {\n     Scanner sc = new Scanner(System.in);\n     int num = sc.nextInt();\n     \n     int originalNumber = num;\n     int reversedNumber = 0;\n     \n     while(num > 0){\n         int digit = num % 10;\n         num = num \/ 10;\n         reversedNumber = reversedNumber * 10 + digit; \n     }\n     \n     System.out.println(\"Original Number : \"+originalNumber);\n     System.out.println(\"Reversed Number : \"+reversedNumber);\n    }\n   }<\/pre>\n\n\n\n<p><strong>Output<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Original Number : 12345\nReversed Number : 54321\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><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<p>In this program, we have taken the Input of the number we want to reverse using the Scanner Class in Java. Then we have just preserved the original number as we are going to perform the operation on the number and hence the original number will be lost.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Scanner sc = new Scanner(System.in);\n     int num = sc.nextInt();\n     \n     int originalNumber = num;<\/code><\/pre>\n\n\n\n<p>If you want to learn more about taking inputs in Java, read this :   <a href=\"https:\/\/www.codingbroz.com\/java-program-to-get-input-from-user\/\" target=\"_blank\" rel=\"noreferrer noopener\">Input in Java<\/a><\/p>\n\n\n\n<p>Now, lets understand the logic to reverse the number in Java.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>while(num &gt; 0){\n         int digit = num % 10;\n         num = num \/ 10;\n         reversedNumber = reversedNumber * 10 + digit; \n     }<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"680\" height=\"472\" src=\"https:\/\/www.codingbroz.com\/wp-content\/uploads\/2022\/01\/java-reverse-number1.png\" alt=\"java reverse number logic 1\" class=\"wp-image-5226\"\/><\/figure>\n\n\n\n<p>So, we are dividing the <strong>num <\/strong>till it becomes <strong>0, <\/strong>and using the remainder we can form the Reversed Number.<\/p>\n\n\n\n<p><strong>remainder = remainder * 10 + digit <\/strong><\/p>\n\n\n\n<p>By using the equation we will form the reversed number. It will be more clear with an example and dry run. so let&#8217;s see :<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"700\" height=\"878\" src=\"https:\/\/www.codingbroz.com\/wp-content\/uploads\/2022\/01\/java-reverse-numer2.png\" alt=\"java reverse number logic 2\" class=\"wp-image-5227\"\/><\/figure>\n\n\n\n<pre class=\"wp-block-code\"><code>System.out.println(\"Original Number : \"+originalNumber);\nSystem.out.println(\"Reversed Number : \"+reversedNumber);<\/code><\/pre>\n\n\n\n<p>So, we have just reversed our given number. Now just print both the number.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><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 in Java<\/strong> Programming language and learned to code a <strong>Java Program to Reverse a Number.<\/strong><\/p>\n\n\n\n<p>If you have any doubt regarding the topic, feel free to contact us in the comment section. We will be delighted to help 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\/java-program-to-add-two-numbers\/\">Java Program to Add Two Numbers<\/a><\/strong><\/li><li><strong><a href=\"https:\/\/www.codingbroz.com\/java-program-to-multiply-two-numbers\/\">Java Program to Multiply Two Numbers<\/a><\/strong><\/li><li><strong><a href=\"https:\/\/www.codingbroz.com\/java-program-to-find-ascii-value-of-a-character\/\">Java Program to Find ASCII Value of a Character<\/a><\/strong><\/li><li><strong><a href=\"https:\/\/www.codingbroz.com\/java-program-to-find-size-of-different-data-types\/\">Java Program to Find Size of Different Data Types<\/a><\/strong><\/li><li><strong><a href=\"https:\/\/www.codingbroz.com\/java-program-to-find-quotient-and-remainder\/\">Java Program to Find Quotient and Remainder<\/a><\/strong><\/li><\/ul>\n","protected":false},"excerpt":{"rendered":"<p> In this post, we will know how to reverse a number Using Java Programming language. Let&#8217;s see the Java Program to reverse a number.<\/p>\n","protected":false},"author":3,"featured_media":5225,"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 center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","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-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-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-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-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-gradient":""}},"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[31,422],"tags":[61,144,503,349,504],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"https:\/\/www.codingbroz.com\/wp-content\/uploads\/2022\/01\/java-reverse-number.png","jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/posts\/5224"}],"collection":[{"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/comments?post=5224"}],"version-history":[{"count":2,"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/posts\/5224\/revisions"}],"predecessor-version":[{"id":5233,"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/posts\/5224\/revisions\/5233"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/media\/5225"}],"wp:attachment":[{"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/media?parent=5224"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/categories?post=5224"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/tags?post=5224"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}