{"id":5489,"date":"2022-02-03T23:05:00","date_gmt":"2022-02-03T17:35:00","guid":{"rendered":"https:\/\/www.codingbroz.com\/?p=5489"},"modified":"2022-02-03T11:49:22","modified_gmt":"2022-02-03T06:19:22","slug":"java-program-to-check-armstrong-number","status":"publish","type":"post","link":"https:\/\/www.codingbroz.com\/java-program-to-check-armstrong-number\/","title":{"rendered":"Java Program to Check Armstrong Number"},"content":{"rendered":"\n<p>In this program, we will learn <strong>How to Check Armstrong Number in Java Programming Language<\/strong>. Let&#8217;s understand Armstrong numbers and then we will code the <strong>Java Program to Check Armstrong Number.<\/strong><\/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-66361b2a68ce8\" 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-66361b2a68ce8\" 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-check-armstrong-number\/#What_is_Armstrong_Number\" title=\"What is Armstrong Number?\">What is Armstrong 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-check-armstrong-number\/#Java_Program_to_Check_Armstrong_Number\" title=\"Java Program to Check Armstrong Number\">Java Program to Check Armstrong Number<\/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-check-armstrong-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-4\" href=\"https:\/\/www.codingbroz.com\/java-program-to-check-armstrong-number\/#Conclusion\" title=\"Conclusion\">Conclusion<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\" id=\"what-is-armstrong-number\"><span class=\"ez-toc-section\" id=\"What_is_Armstrong_Number\"><\/span><strong>What is Armstrong Number?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p><strong>Armstrong numbers <\/strong>are numbers that are equal to the sum of the cubes of its digit. <strong>Armstrong numbers <\/strong>are also called <strong>Narcissistic Numbers<\/strong>. <\/p>\n\n\n\n<p>For example, <strong>0, 1, 153, 370, 371, and 407<\/strong> are some Armstrong numbers.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code><strong>let's see 407,<\/strong>\n\n<strong>4\u00b3 + 0\u00b3 + 7\u00b3 = 64 + 0 + 343 = 407<\/strong>\n\nHence, 407 is an Armstrong number.<\/code><\/pre>\n\n\n\n<p>Let&#8217;s see the <strong>Java Program to Check Armstrong Number.<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"java-program-to-check-armstrong-number\"><span class=\"ez-toc-section\" id=\"Java_Program_to_Check_Armstrong_Number\"><\/span><strong>Java Program to Check Armstrong 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\npublic class Main{\n    \n    public static void main(String[] args){\n        \n        Scanner sc = new Scanner(System.in);\n        System.out.println(\"Enter the number : \");\n        int number = sc.nextInt();\n        \n        if(number == 0 || number == 1){\n            System.out.println(\"\"+number+\" is an Armstrong Number !\");\n            return;\n        }\n        \n        int num = number; \/\/ preserving the original number\n        \n        int sum = 0;\n        \n        while(num > 0){\n            int digit = num % 10;\n            sum += Math.pow(digit,3);\n            num = num \/ 10;\n        }\n        if(sum == number){\n            System.out.println(\"\"+number+\" is an Armstrong Number !\");\n        }else{\n            System.out.println(\"\"+number+\" is NOT an Armstrong Number !\");\n        }\n\n    }\n    \n}<\/pre>\n\n\n\n<p><strong>Output 1<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Enter the number: 370\n<strong>370 is an Armstrong Number !<\/strong>\n<\/code><\/pre>\n\n\n\n<p><strong>Output 2<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Enter the number: 147\n<strong>147 is NOT an Armstrong Number !<\/strong><\/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><strong>How Does This Program Work ?<\/strong><\/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=\"\">        Scanner sc = new Scanner(System.in);\n        System.out.println(\"Enter the number : \");\n        int number = sc.nextInt();<\/pre>\n\n\n\n<p>In this Program, first, we take the input of the number from the user using the Scanner Class in Java.<\/p>\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=\"\">        if(number == 0 || number == 1){\n            System.out.println(\"\"+number+\" is an Armstrong Number !\");\n            return;\n        }<\/pre>\n\n\n\n<p>Then, we check whether the given number is 0 or 1. If the given number is 0 or 1, we display that the given number is an Armstrong number and we return, as there is no need to perform any further calculation to check so.<\/p>\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=\"\">        int num = number; \/\/ preserving the original number\n        \n        int sum = 0;<\/pre>\n\n\n\n<p>then, we declare two variables of<strong> int<\/strong> datatype. Variable <strong>num<\/strong> stores the value of the number to perform the calculation on digits and by this, the original number is also preserved in variable named<strong> number<\/strong>. Then, we assign the variable sum with the value 0 to store the sum of the cube of the digits of the given number.<\/p>\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=\"\">        while(num > 0){\n            int digit = num % 10;\n            sum += Math.pow(digit,3);\n            num = num \/ 10;\n        }\n        if(sum == number){\n            System.out.println(\"\"+number+\" is an Armstrong Number !\");\n        }else{\n            System.out.println(\"\"+number+\" is NOT an Armstrong Number !\");\n        }<\/pre>\n\n\n\n<p>Then, we used a while to get each digit of the number and then we sum the cube of the digits. We used <strong>Math.pow() <\/strong>function to cube the digits.<\/p>\n\n\n\n<p>Let&#8217;s take an example of number <strong>407<\/strong>,<br>In first iteration,<strong> 407 > 0 <\/strong>so we go into the loop, <strong>digit = 407 % 10 = 7<\/strong>, then <strong>sum = sum + Math.pow(7,3) = 0 + 7\u00b3 = 343.<\/strong><br>Then, the num becomes <strong>407 \/ 10 = 40.<\/strong><\/p>\n\n\n\n<p>In second iteration,<strong> 40 > 0, digit = 40 % 10 = 0, <\/strong>then <strong>sum = sum + 0\u00b3 = 343 + 0 = 343, and 40 \/ 10 = 4<\/strong><\/p>\n\n\n\n<p>In third iteration, <strong>4 > 0, digit = 4 % 10 = 4,<\/strong> then <strong>sum = sum + 4\u00b3 = 343 + 64 = 407, and 4 \/ 10 = 0<\/strong>.<\/p>\n\n\n\n<p>Now, as the num is not greater than 0, the while loop is terminated.<\/p>\n\n\n\n<p>Then, we check if the <strong>sum is equal to the original number stored in variable number,<\/strong> we print that the <strong>given number is an Armstrong number<\/strong>, otherwise, we print the <strong>given number is not an Armstrong number. <\/strong><\/p>\n\n\n\n<p>This is the <strong>Java Program to Check Armstrong Number.<\/strong><\/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><strong><strong><strong>Java Program to Check Armstrong number.<\/strong><\/strong><\/strong><\/strong><br>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><a href=\"https:\/\/www.codingbroz.com\/java-program-to-add-two-complex-numbers\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><a style=\"font-weight: bold;\" href=\"https:\/\/www.codingbroz.com\/java-program-to-add-two-complex-numbers\/\" target=\"_blank\" rel=\"noreferrer noopener\">Java Program to Add Two Complex Numbers<\/a><\/li><li><strong><a href=\"https:\/\/www.codingbroz.com\/java-program-to-multiply-two-numbers\/\" target=\"_blank\" rel=\"noreferrer noopener\">Java Program to Multiply Two Numbers<\/a><\/strong><\/li><li><strong><a href=\"https:\/\/www.codingbroz.com\/java-program-to-swap-two-numbers\/\" target=\"_blank\" rel=\"noreferrer noopener\">Java Program to Swap Two Numbers<\/a><\/strong><\/li><li><strong><a href=\"https:\/\/www.codingbroz.com\/java-program-to-find-factorial-of-a-number\/\" target=\"_blank\" rel=\"noreferrer noopener\">Java Program to Find Factorial of a Number<\/a><\/strong><\/li><li><strong><a href=\"https:\/\/www.codingbroz.com\/java-program-to-check-prime-number\/\" target=\"_blank\" rel=\"noreferrer noopener\">Java Program to Check Prime Number<\/a><\/strong><\/li><\/ul>\n","protected":false},"excerpt":{"rendered":"<p>In this program, we will learn How to Check Armstrong Number in Java Programming Language. Let&#8217;s understand Armstrong numbers and then we will code the Java Program to Check Armstrong Number.<\/p>\n","protected":false},"author":3,"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 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":[144,568,349,146],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/posts\/5489"}],"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=5489"}],"version-history":[{"count":2,"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/posts\/5489\/revisions"}],"predecessor-version":[{"id":5494,"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/posts\/5489\/revisions\/5494"}],"wp:attachment":[{"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/media?parent=5489"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/categories?post=5489"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/tags?post=5489"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}