{"id":25538744,"date":"2022-08-18T21:28:27","date_gmt":"2022-08-18T15:58:27","guid":{"rendered":"https:\/\/entri.app\/blog\/?p=25538744"},"modified":"2022-11-23T14:40:12","modified_gmt":"2022-11-23T09:10:12","slug":"how-to-reverse-a-number-in-java","status":"publish","type":"post","link":"https:\/\/entri.app\/blog\/how-to-reverse-a-number-in-java\/","title":{"rendered":"How to Reverse a Number in Java"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_79_2 counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<label for=\"ez-toc-cssicon-toggle-item-69e5c97a0c151\" class=\"ez-toc-cssicon-toggle-label\"><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><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-69e5c97a0c151\"  aria-label=\"Toggle\" \/><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:\/\/entri.app\/blog\/how-to-reverse-a-number-in-java\/#Java_program_to_reverse_a_number_follow_the_steps_given_below\" >Java program to reverse a number, follow the steps given below:<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/entri.app\/blog\/how-to-reverse-a-number-in-java\/#Example\" >Example<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/entri.app\/blog\/how-to-reverse-a-number-in-java\/#Reverse_a_number_using_while_loop\" >Reverse a number using while loop<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/entri.app\/blog\/how-to-reverse-a-number-in-java\/#Reverse_a_number_using_for_loop\" >Reverse a number using for loop<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/entri.app\/blog\/how-to-reverse-a-number-in-java\/#Reverse_a_number_using_recursion\" >Reverse a number using recursion<\/a><\/li><\/ul><\/nav><\/div>\n<h1 class=\"h1\"><\/h1>\n<p>In this article, we will learn <span data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;java program to reverse a number&quot;}\" data-sheets-userformat=\"{&quot;2&quot;:1325695,&quot;3&quot;:{&quot;1&quot;:0},&quot;4&quot;:{&quot;1&quot;:2,&quot;2&quot;:16777215},&quot;5&quot;:{&quot;1&quot;:[{&quot;1&quot;:2,&quot;2&quot;:0,&quot;5&quot;:{&quot;1&quot;:2,&quot;2&quot;:0}},{&quot;1&quot;:0,&quot;2&quot;:0,&quot;3&quot;:3},{&quot;1&quot;:1,&quot;2&quot;:0,&quot;4&quot;:1}]},&quot;6&quot;:{&quot;1&quot;:[{&quot;1&quot;:2,&quot;2&quot;:0,&quot;5&quot;:{&quot;1&quot;:2,&quot;2&quot;:0}},{&quot;1&quot;:0,&quot;2&quot;:0,&quot;3&quot;:3},{&quot;1&quot;:1,&quot;2&quot;:0,&quot;4&quot;:1}]},&quot;7&quot;:{&quot;1&quot;:[{&quot;1&quot;:2,&quot;2&quot;:0,&quot;5&quot;:{&quot;1&quot;:2,&quot;2&quot;:0}},{&quot;1&quot;:0,&quot;2&quot;:0,&quot;3&quot;:3},{&quot;1&quot;:1,&quot;2&quot;:0,&quot;4&quot;:1}]},&quot;8&quot;:{&quot;1&quot;:[{&quot;1&quot;:2,&quot;2&quot;:0,&quot;5&quot;:{&quot;1&quot;:2,&quot;2&quot;:0}},{&quot;1&quot;:0,&quot;2&quot;:0,&quot;3&quot;:3},{&quot;1&quot;:1,&quot;2&quot;:0,&quot;4&quot;:1}]},&quot;9&quot;:0,&quot;12&quot;:0,&quot;14&quot;:{&quot;1&quot;:2,&quot;2&quot;:0},&quot;15&quot;:&quot;Arial&quot;,&quot;16&quot;:10,&quot;21&quot;:0,&quot;23&quot;:2}\">java program to reverse a number<\/span> using while loop, for loop and recursion.<\/p>\n<p><a href=\"https:\/\/bit.ly\/3ELmCiA\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-25522670 size-full\" src=\"https:\/\/entri.app\/blog\/wp-content\/uploads\/2022\/04\/Python-and-Machine-Learning-Rectangle-1.png\" alt=\"Python and Machine Learning Rectangle\" width=\"970\" height=\"250\" srcset=\"https:\/\/entri.app\/blog\/wp-content\/uploads\/2022\/04\/Python-and-Machine-Learning-Rectangle-1.png 970w, https:\/\/entri.app\/blog\/wp-content\/uploads\/2022\/04\/Python-and-Machine-Learning-Rectangle-1-300x77.png 300w, https:\/\/entri.app\/blog\/wp-content\/uploads\/2022\/04\/Python-and-Machine-Learning-Rectangle-1-768x198.png 768w, https:\/\/entri.app\/blog\/wp-content\/uploads\/2022\/04\/Python-and-Machine-Learning-Rectangle-1-750x193.png 750w\" sizes=\"auto, (max-width: 970px) 100vw, 970px\" \/><\/a><\/p>\n<h2 class=\"h2\"><span class=\"ez-toc-section\" id=\"Java_program_to_reverse_a_number_follow_the_steps_given_below\"><\/span><strong>Java program to reverse a number, follow the steps given below:<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul class=\"points\">\n<li>First, we find the remainder of the given number by using the modulo (%) operator.<\/li>\n<li>Multiply the variable reverse by 10 and add the remainder into it.<\/li>\n<li>Divide the number by 10.<\/li>\n<\/ul>\n<p>Repeat the above steps until the number becomes 0.<\/p>\n<p style=\"text-align: center;\"><strong><a href=\"https:\/\/bit.ly\/3ELmCiA\" target=\"_blank\" rel=\"noopener\">Learn Coding in your Language! Enroll Here!<\/a><\/strong><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/static.javatpoint.com\/core\/images\/how-to-reverse-a-number-in-java.png\" alt=\"How to Reverse a Number in Java\" \/><\/p>\n<p>There are\u00a0<strong>three<\/strong>\u00a0ways to reverse a number in\u00a0Java:<\/p>\n<ul class=\"points\">\n<li>Reverse a number using while loop<\/li>\n<li>Reverse a number using for loop<\/li>\n<li>Reverse a number using recursion<\/li>\n<\/ul>\n<p>Let&#8217;s apply the above steps in an example.<\/p>\n<div id=\"31d834e2-cf8d-4065-b4b0-2502cb42b89b\" class=\"_ap_apex_ad\" style=\"clear: both; text-align: center; margin: 10px auto; width: 535px; height: 300px; overflow: hidden;\" data-section=\"31d834e2-cf8d-4065-b4b0-2502cb42b89b\" data-xpath=\"#city &gt; table:eq(0) &gt; tbody:eq(0) &gt; tr:eq(0) &gt; td:eq(0) &gt; p:eq(3)\" data-section-id=\"\" data-ap-network=\"custom\">\n<div id=\"primisPlayerContainerDiv\" class=\"primisslate\">\n<div id=\"primis_container_div\">\n<div id=\"primis_playerSekindoSPlayer62fe47ddcc7f1\">\n<div id=\"Player-Div-SekindoSPlayer62fe47ddcc7f1\">\n<div id=\"Video-Div-SekindoSPlayer62fe47ddcc7f1\">\n<div id=\"Video-iFrame-SekindoSPlayer62fe47ddcc7f1\">\n<div id=\"layoutContainerDiv\">\n<div id=\"layoutDesign\">\n<div id=\"viewsElements\">\n<div id=\"viewsIcon\"><\/div>\n<div id=\"viewsNum\">43.7M<\/div>\n<div id=\"likesIcon\"><\/div>\n<div id=\"likesNum\">747<\/div>\n<\/div>\n<div id=\"topLeftElements\">\n<div id=\"titleObj\">\n<div id=\"titleTxt\">History of Java<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<h2 class=\"h2\"><span class=\"ez-toc-section\" id=\"Example\"><\/span><strong>Example<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Suppose, we want to reverse the number 1234.<\/p>\n<p>In this example, we have taken three variables named\u00a0number\u00a0(the number to be reversed),\u00a0remainder\u00a0(stores the remainder),\u00a0reverse\u00a0(stores the reverse number) initialized 0.<\/p>\n<p><strong>Iteration 1:<\/strong><\/p>\n<div class=\"formula\">number = 1234<br \/>\nremainder = 1234 % 10 = 4<br \/>\nreverse = 0 * 10 + 4 = 0 + 4 = 4<br \/>\nnumber = 1234 \/ 10 = 123<\/div>\n<p>Now the value of the number and reverse variable is 123 and 4, respectively.<\/p>\n<p><strong>Iteration 2:<\/strong><\/p>\n<div class=\"formula\">number = 123<br \/>\nremainder = 123 % 10 = 3<br \/>\nreverse = 4 * 10 + 3 = 40 + 3 = 43<br \/>\nnumber = 123 \/ 10 = 12<\/div>\n<p>Now the value of the number and reverse variable is 12 and 43, respectively.<\/p>\n<p><strong>Iteration 3:<\/strong><\/p>\n<div class=\"formula\">number = 12<br \/>\nremainder = 12 % 10 = 2<br \/>\nreverse = 43 * 10 + 2 = 430 + 2 = 432<br \/>\nnumber = 12 \/ 10 = 1<\/div>\n<p>Now the value of the number and reverse variable is 1 and 432, respectively.<\/p>\n<p><strong>Iteration 4:<\/strong><\/p>\n<div class=\"formula\">number = 1<br \/>\nremainder = 1 % 10 = 1<br \/>\nreverse = 432 * 10 + 1 = 4320 + 1 = 4321<br \/>\nnumber = 1 \/ 10 = 0<\/div>\n<p>Now the variable number become 0. Hence, we get the reverse number\u00a0<strong>4321<\/strong>.<\/p>\n<p>Let&#8217;s implement the above logic in a\u00a0Java program.<\/p>\n<h2 class=\"h2\"><span class=\"ez-toc-section\" id=\"Reverse_a_number_using_while_loop\"><\/span><strong>Reverse a number using while loop<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong>ReverseNumberExample1.java<\/strong><\/p>\n<div class=\"codeblock\">\n<div class=\"dp-highlighter\">\n<div class=\"bar\">\n<div class=\"tools\"><\/div>\n<\/div>\n<ol class=\"dp-j\" start=\"1\">\n<li class=\"alt\"><span class=\"keyword\">public<\/span>\u00a0<span class=\"keyword\">class<\/span>\u00a0ReverseNumberExample1<\/li>\n<li class=\"\">{<\/li>\n<li class=\"alt\"><span class=\"keyword\">public<\/span>\u00a0<span class=\"keyword\">static<\/span>\u00a0<span class=\"keyword\">void<\/span>\u00a0main(String[]\u00a0args)<\/li>\n<li class=\"\">{<\/li>\n<li class=\"alt\"><span class=\"keyword\">int<\/span>\u00a0number\u00a0=\u00a0<span class=\"number\">987654<\/span>,\u00a0reverse\u00a0=\u00a0<span class=\"number\">0<\/span>;<\/li>\n<li class=\"\"><span class=\"keyword\">while<\/span>(number\u00a0!=\u00a0<span class=\"number\">0<\/span>)<\/li>\n<li class=\"alt\">{<\/li>\n<li class=\"\"><span class=\"keyword\">int<\/span>\u00a0remainder\u00a0=\u00a0number\u00a0%\u00a0<span class=\"number\">10<\/span>;<\/li>\n<li class=\"alt\">reverse\u00a0=\u00a0reverse\u00a0*\u00a0<span class=\"number\">10<\/span>\u00a0+\u00a0remainder;<\/li>\n<li class=\"\">number\u00a0=\u00a0number\/<span class=\"number\">10<\/span>;<\/li>\n<li class=\"alt\">}<\/li>\n<li class=\"\">System.out.println(<span class=\"string\">&#8220;The\u00a0reverse\u00a0of\u00a0the\u00a0given\u00a0number\u00a0is:\u00a0&#8220;<\/span>\u00a0+\u00a0reverse);<\/li>\n<li class=\"alt\">}<\/li>\n<li class=\"\">}<\/li>\n<\/ol>\n<\/div>\n<\/div>\n<p><strong>Output<\/strong><\/p>\n<div class=\"codeblock3\">\n<pre>The reverse of the given number is: 456789\r\n<\/pre>\n<\/div>\n<h2 class=\"h2\"><span class=\"ez-toc-section\" id=\"Reverse_a_number_using_for_loop\"><\/span><strong>Reverse a number using for loop<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>In the following program, we have replaced the while loop by a for loop. It also removes the last digit of the number, after each iteration. When the condition,\u00a0<strong>number!=0<\/strong>\u00a0becomes false, the loop exits and we get the reversed number.<\/p>\n<p><strong>ReverseNumberExample2.java<\/strong><\/p>\n<div class=\"codeblock\">\n<div class=\"dp-highlighter\">\n<div class=\"bar\">\n<div class=\"tools\"><\/div>\n<\/div>\n<ol class=\"dp-j\" start=\"1\">\n<li class=\"alt\"><span class=\"keyword\">public<\/span>\u00a0<span class=\"keyword\">class<\/span>\u00a0ReverseNumberExample2<\/li>\n<li class=\"\">{<\/li>\n<li class=\"alt\"><span class=\"keyword\">public<\/span>\u00a0<span class=\"keyword\">static<\/span>\u00a0<span class=\"keyword\">void<\/span>\u00a0main(String[]\u00a0args)<\/li>\n<li class=\"\">{<\/li>\n<li class=\"alt\"><span class=\"keyword\">int<\/span>\u00a0number\u00a0=\u00a0<span class=\"number\">123456<\/span>,\u00a0reverse\u00a0=\u00a0<span class=\"number\">0<\/span>;<\/li>\n<li class=\"\"><span class=\"comment\">\/\/we\u00a0have\u00a0not\u00a0mentioned\u00a0the\u00a0initialization\u00a0part\u00a0of\u00a0the\u00a0for\u00a0loop<\/span><\/li>\n<li class=\"alt\"><span class=\"keyword\">for<\/span>(\u00a0;number\u00a0!=\u00a0<span class=\"number\">0<\/span>;\u00a0number=number\/<span class=\"number\">10<\/span>)<\/li>\n<li class=\"\">{<\/li>\n<li class=\"alt\"><span class=\"keyword\">int<\/span>\u00a0remainder\u00a0=\u00a0number\u00a0%\u00a0<span class=\"number\">10<\/span>;<\/li>\n<li class=\"\">reverse\u00a0=\u00a0reverse\u00a0*\u00a0<span class=\"number\">10<\/span>\u00a0+\u00a0remainder;<\/li>\n<li class=\"alt\">}<\/li>\n<li class=\"\">System.out.println(<span class=\"string\">&#8220;The\u00a0reverse\u00a0of\u00a0the\u00a0given\u00a0number\u00a0is:\u00a0&#8220;<\/span>\u00a0+\u00a0reverse);<\/li>\n<li class=\"alt\">}<\/li>\n<li class=\"\">}<\/li>\n<\/ol>\n<\/div>\n<\/div>\n<p><strong>Output<\/strong><\/p>\n<div class=\"codeblock3\">\n<pre>The reverse of the given number is: 654321\r\n<\/pre>\n<\/div>\n<p>In the above program, we can also write the for loop as follows:<\/p>\n<div class=\"codeblock\">\n<div class=\"dp-highlighter\">\n<div class=\"bar\">\n<div class=\"tools\"><\/div>\n<\/div>\n<ol class=\"dp-j\" start=\"1\">\n<li class=\"alt\"><span class=\"keyword\">for<\/span>(;number\u00a0!=\u00a0<span class=\"number\">0<\/span>\ud83d\ude09<\/li>\n<li class=\"\">{<\/li>\n<li class=\"alt\"><span class=\"keyword\">int<\/span>\u00a0remainder\u00a0=\u00a0number\u00a0%\u00a0<span class=\"number\">10<\/span>;<\/li>\n<li class=\"\">reverse\u00a0=\u00a0reverse\u00a0*\u00a0<span class=\"number\">10<\/span>\u00a0+\u00a0remainder;<\/li>\n<li class=\"alt\">number=number\/<span class=\"number\">10<\/span>;<\/li>\n<li class=\"\">}<\/li>\n<\/ol>\n<p style=\"text-align: center;\"><a href=\"https:\/\/bit.ly\/3ELmCiA\" target=\"_blank\" rel=\"noopener\"><strong>Learn to code from industry experts! Enroll here<\/strong><\/a><\/p>\n<\/div>\n<\/div>\n<h2 class=\"h2\"><span class=\"ez-toc-section\" id=\"Reverse_a_number_using_recursion\"><\/span><strong>Reverse a number using recursion<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong>ReverseNumberExample3.java<\/strong><\/p>\n<div class=\"codeblock\">\n<div class=\"dp-highlighter\">\n<div class=\"bar\">\n<div class=\"tools\"><\/div>\n<\/div>\n<ol class=\"dp-j\" start=\"1\">\n<li class=\"alt\"><span class=\"keyword\">import<\/span>\u00a0java.util.Scanner;<\/li>\n<li class=\"\"><span class=\"keyword\">public<\/span>\u00a0<span class=\"keyword\">class<\/span>\u00a0ReverseNumberExample3<\/li>\n<li class=\"alt\">{<\/li>\n<li class=\"\"><span class=\"comment\">\/\/method\u00a0for\u00a0reverse\u00a0a\u00a0number<\/span><\/li>\n<li class=\"alt\"><span class=\"keyword\">public<\/span>\u00a0<span class=\"keyword\">static<\/span>\u00a0<span class=\"keyword\">void<\/span>\u00a0reverseNumber(<span class=\"keyword\">int<\/span>\u00a0number)<\/li>\n<li class=\"\">{<\/li>\n<li class=\"alt\"><span class=\"keyword\">if<\/span>\u00a0(number\u00a0&lt;\u00a0<span class=\"number\">10<\/span>)<\/li>\n<li class=\"\">{<\/li>\n<li class=\"alt\"><span class=\"comment\">\/\/prints\u00a0the\u00a0same\u00a0number\u00a0if\u00a0the\u00a0number\u00a0is\u00a0less\u00a0than\u00a010<\/span><\/li>\n<li class=\"\">System.out.println(number);<\/li>\n<li class=\"alt\"><span class=\"keyword\">return<\/span>;<\/li>\n<li class=\"\">}<\/li>\n<li class=\"alt\"><span class=\"keyword\">else<\/span><\/li>\n<li class=\"\">{<\/li>\n<li class=\"alt\">System.out.print(number\u00a0%\u00a0<span class=\"number\">10<\/span>);<\/li>\n<li class=\"\">reverseNumber(number\/<span class=\"number\">10<\/span>);<\/li>\n<li class=\"alt\">}<\/li>\n<li class=\"\">}<\/li>\n<li class=\"alt\"><span class=\"keyword\">public<\/span>\u00a0<span class=\"keyword\">static<\/span>\u00a0<span class=\"keyword\">void<\/span>\u00a0main(String\u00a0args[])<\/li>\n<li class=\"\">{<\/li>\n<li class=\"alt\">System.out.print(<span class=\"string\">&#8220;Enter\u00a0the\u00a0number\u00a0that\u00a0you\u00a0want\u00a0to\u00a0reverse:\u00a0&#8220;<\/span>);<\/li>\n<li class=\"\">Scanner\u00a0sc\u00a0=\u00a0<span class=\"keyword\">new<\/span>\u00a0Scanner(System.in);<\/li>\n<li class=\"alt\"><span class=\"keyword\">int<\/span>\u00a0num\u00a0=\u00a0sc.nextInt();<\/li>\n<li class=\"\">System.out.print(<span class=\"string\">&#8220;The\u00a0reverse\u00a0of\u00a0the\u00a0given\u00a0number\u00a0is:\u00a0&#8220;<\/span>);<\/li>\n<li class=\"alt\"><span class=\"comment\">\/\/method\u00a0calling<\/span><\/li>\n<li class=\"\">reverseNumber(num);<\/li>\n<li class=\"alt\">}<\/li>\n<li class=\"\">}<\/li>\n<\/ol>\n<\/div>\n<\/div>\n<p><strong>Output 1:<\/strong><\/p>\n<div class=\"codeblock3\">\n<pre>Enter the number that you want to reverse: 9\r\nThe reverse of the given number is: 9\r\n<\/pre>\n<\/div>\n<p><strong>Output 2:<\/strong><\/p>\n<div class=\"codeblock3\">\n<pre>Enter the number that you want to reverse: 7654123\r\nThe reverse of the given number is: 3214567\r\n<\/pre>\n<\/div>\n<p>The following program reverses both numbers, positive and negative. When we enter a number, it first checks the number is positive or negative. If the number is negative, it converts the number into positive by multiplying -1. After that, it performs the same steps (as we have performed in the above programs) to reverse a number. At last, again it checks the number is negative or positive. To make the number negative, it again multiplies the reverse number by -1.<\/p>\n<p><strong>ReverseNumberExample4.java<\/strong><\/p>\n<div class=\"codeblock\">\n<div class=\"dp-highlighter\">\n<div class=\"bar\">\n<div class=\"tools\"><\/div>\n<\/div>\n<ol class=\"dp-j\" start=\"1\">\n<li class=\"alt\"><span class=\"keyword\">import<\/span>\u00a0java.util.*;<\/li>\n<li class=\"\"><span class=\"keyword\">public<\/span>\u00a0<span class=\"keyword\">class<\/span>\u00a0ReverseNumberExample4<\/li>\n<li class=\"alt\">{<\/li>\n<li class=\"\"><span class=\"keyword\">public<\/span>\u00a0<span class=\"keyword\">static<\/span>\u00a0<span class=\"keyword\">void<\/span>\u00a0main(String\u00a0args[])<\/li>\n<li class=\"alt\">{<\/li>\n<li class=\"\">System.out.print(<span class=\"string\">&#8220;Enter\u00a0the\u00a0number\u00a0that\u00a0you\u00a0want\u00a0to\u00a0reverse:\u00a0&#8220;<\/span>);<\/li>\n<li class=\"alt\">Scanner\u00a0sc\u00a0=\u00a0<span class=\"keyword\">new<\/span>\u00a0Scanner(System.in);<\/li>\n<li class=\"\"><span class=\"keyword\">int<\/span>\u00a0n\u00a0=\u00a0sc.nextInt();<\/li>\n<li class=\"alt\"><span class=\"keyword\">int<\/span>\u00a0reverse_number\u00a0=\u00a0reverseNumber(n);<\/li>\n<li class=\"\">System.out.println(<span class=\"string\">&#8220;The\u00a0reverse\u00a0of\u00a0the\u00a0given\u00a0number\u00a0is:\u00a0&#8220;<\/span>+reverse_number);<\/li>\n<li class=\"alt\">}<\/li>\n<li class=\"\"><span class=\"comment\">\/\/method\u00a0to\u00a0reverse\u00a0a\u00a0number<\/span><\/li>\n<li class=\"alt\"><span class=\"keyword\">public<\/span>\u00a0<span class=\"keyword\">static<\/span>\u00a0<span class=\"keyword\">int<\/span>\u00a0reverseNumber(<span class=\"keyword\">int<\/span>\u00a0number)<\/li>\n<li class=\"\">{<\/li>\n<li class=\"alt\"><span class=\"keyword\">boolean<\/span>\u00a0isNoNegative\u00a0=\u00a0number\u00a0&lt;\u00a0<span class=\"number\">0<\/span>\u00a0?\u00a0<span class=\"keyword\">true<\/span>\u00a0:\u00a0<span class=\"keyword\">false<\/span>;<\/li>\n<li class=\"\"><span class=\"keyword\">if<\/span>(isNoNegative)<\/li>\n<li class=\"alt\">{<\/li>\n<li class=\"\">number\u00a0=\u00a0number\u00a0*\u00a0&#8211;<span class=\"number\">1<\/span>;\u00a0<span class=\"comment\">\/\/makes\u00a0the\u00a0number\u00a0positive\u00a0if\u00a0the\u00a0given\u00a0number\u00a0is\u00a0negative<\/span><\/li>\n<li class=\"alt\">}<\/li>\n<li class=\"\"><span class=\"keyword\">int<\/span>\u00a0reverse\u00a0=\u00a0<span class=\"number\">0<\/span>;<\/li>\n<li class=\"alt\"><span class=\"keyword\">int<\/span>\u00a0lastDigit\u00a0=\u00a0<span class=\"number\">0<\/span>;<\/li>\n<li class=\"\"><span class=\"keyword\">while<\/span>\u00a0(number\u00a0&gt;=\u00a0<span class=\"number\">1<\/span>)<\/li>\n<li class=\"alt\">{<\/li>\n<li class=\"\">lastDigit\u00a0=\u00a0number\u00a0%\u00a0<span class=\"number\">10<\/span>;\u00a0<span class=\"comment\">\/\/\u00a0gives\u00a0the\u00a0last\u00a0digit\u00a0of\u00a0the\u00a0number<\/span><\/li>\n<li class=\"alt\">reverse\u00a0=\u00a0reverse\u00a0*\u00a0<span class=\"number\">10<\/span>\u00a0+\u00a0lastDigit;<\/li>\n<li class=\"\">number\u00a0=\u00a0number\u00a0\/\u00a0<span class=\"number\">10<\/span>;\u00a0<span class=\"comment\">\/\/\u00a0removes\u00a0the\u00a0last\u00a0digit\u00a0of\u00a0the\u00a0number<\/span><\/li>\n<li class=\"alt\">}<\/li>\n<li class=\"\"><span class=\"comment\">\/\/makes\u00a0the\u00a0number\u00a0negative\u00a0<\/span><\/li>\n<li class=\"alt\"><span class=\"keyword\">return<\/span>\u00a0isNoNegative\u00a0==\u00a0<span class=\"keyword\">true<\/span>?\u00a0reverse*-<span class=\"number\">1<\/span>\u00a0:\u00a0reverse;<\/li>\n<li class=\"\">}<\/li>\n<li class=\"alt\">}<\/li>\n<\/ol>\n<p><a href=\"https:\/\/bit.ly\/3ELmCiA\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-25522670 size-full\" src=\"https:\/\/entri.app\/blog\/wp-content\/uploads\/2022\/04\/Python-and-Machine-Learning-Rectangle-1.png\" alt=\"Python and Machine Learning Rectangle\" width=\"970\" height=\"250\" srcset=\"https:\/\/entri.app\/blog\/wp-content\/uploads\/2022\/04\/Python-and-Machine-Learning-Rectangle-1.png 970w, https:\/\/entri.app\/blog\/wp-content\/uploads\/2022\/04\/Python-and-Machine-Learning-Rectangle-1-300x77.png 300w, https:\/\/entri.app\/blog\/wp-content\/uploads\/2022\/04\/Python-and-Machine-Learning-Rectangle-1-768x198.png 768w, https:\/\/entri.app\/blog\/wp-content\/uploads\/2022\/04\/Python-and-Machine-Learning-Rectangle-1-750x193.png 750w\" sizes=\"auto, (max-width: 970px) 100vw, 970px\" \/><\/a><\/p>\n<\/div>\n<\/div>\n<p><strong>Output 1:<\/strong><\/p>\n<div class=\"codeblock3\">\n<pre>Enter the number that you want to reverse: -98765\r\nThe reverse of the given number is: -56789\r\n<\/pre>\n<\/div>\n<p style=\"text-align: center;\"><strong><a href=\"https:\/\/bit.ly\/3ELmCiA\" target=\"_blank\" rel=\"noopener\">Grab the opportunity to learn Python with Entri! Click Here<\/a><\/strong><\/p>\n<p><strong>Output 2:<\/strong><\/p>\n<div class=\"codeblock3\">\n<pre>Enter the number that you want to reverse: 321987\r\nThe reverse of the given number is: 789123<\/pre>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>In this article, we will learn java program to reverse a number using while loop, for loop and recursion. Java program to reverse a number, follow the steps given below: First, we find the remainder of the given number by using the modulo (%) operator. Multiply the variable reverse by 10 and add the remainder [&hellip;]<\/p>\n","protected":false},"author":111,"featured_media":25538768,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[802,1882],"tags":[],"class_list":["post-25538744","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-articles","category-java-programming"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How to Reverse a Number in Java - Entri Blog<\/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:\/\/entri.app\/blog\/how-to-reverse-a-number-in-java\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How to Reverse a Number in Java - Entri Blog\" \/>\n<meta property=\"og:description\" content=\"In this article, we will learn java program to reverse a number using while loop, for loop and recursion. Java program to reverse a number, follow the steps given below: First, we find the remainder of the given number by using the modulo (%) operator. Multiply the variable reverse by 10 and add the remainder [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/entri.app\/blog\/how-to-reverse-a-number-in-java\/\" \/>\n<meta property=\"og:site_name\" content=\"Entri Blog\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/entri.me\/\" \/>\n<meta property=\"article:published_time\" content=\"2022-08-18T15:58:27+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2022-11-23T09:10:12+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/entri.app\/blog\/wp-content\/uploads\/2022\/08\/How-to-Reverse-a-Number-in-Java.png\" \/>\n\t<meta property=\"og:image:width\" content=\"820\" \/>\n\t<meta property=\"og:image:height\" content=\"615\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Feeba Mahin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@entri_app\" \/>\n<meta name=\"twitter:site\" content=\"@entri_app\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Feeba Mahin\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/entri.app\/blog\/how-to-reverse-a-number-in-java\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/entri.app\/blog\/how-to-reverse-a-number-in-java\/\"},\"author\":{\"name\":\"Feeba Mahin\",\"@id\":\"https:\/\/entri.app\/blog\/#\/schema\/person\/f036dab84abae3dcc9390a1110d95d36\"},\"headline\":\"How to Reverse a Number in Java\",\"datePublished\":\"2022-08-18T15:58:27+00:00\",\"dateModified\":\"2022-11-23T09:10:12+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/entri.app\/blog\/how-to-reverse-a-number-in-java\/\"},\"wordCount\":705,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/entri.app\/blog\/#organization\"},\"image\":{\"@id\":\"https:\/\/entri.app\/blog\/how-to-reverse-a-number-in-java\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/entri.app\/blog\/wp-content\/uploads\/2022\/08\/How-to-Reverse-a-Number-in-Java.png\",\"articleSection\":[\"Articles\",\"Java Programming\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/entri.app\/blog\/how-to-reverse-a-number-in-java\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/entri.app\/blog\/how-to-reverse-a-number-in-java\/\",\"url\":\"https:\/\/entri.app\/blog\/how-to-reverse-a-number-in-java\/\",\"name\":\"How to Reverse a Number in Java - 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Java program to reverse a number, follow the steps given below: First, we find the remainder of the given number by using the modulo (%) operator. 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