{"id":5775,"date":"2022-03-01T23:00:00","date_gmt":"2022-03-01T17:30:00","guid":{"rendered":"https:\/\/www.codingbroz.com\/?p=5775"},"modified":"2022-03-01T10:27:09","modified_gmt":"2022-03-01T04:57:09","slug":"c-program-to-find-strong-number","status":"publish","type":"post","link":"https:\/\/www.codingbroz.com\/c-program-to-find-strong-number\/","title":{"rendered":"C Program to Find Strong Number"},"content":{"rendered":"\n<p>In this post, we will learn <strong>how to check and find strong numbers using the C<\/strong> Programming language. But first let\u2019s learn about strong numbers.<\/p>\n\n\n\n<p><strong>Strong numbers<\/strong> are the numbers whose sum of factorials of digits is equal to the original number. For example: <strong>145<\/strong> is a strong number. Since, <strong>1! + 4! + 5! = 1 + 24 + 120 = 145<\/strong>.<\/p>\n\n\n\n<p>We will calculate the sum of the factorial of the digits and then compare this sum with the original number. If the sum is equal to the original number, then the entered number is a strong number.<\/p>\n\n\n\n<p>We will use the following methods to check strong numbers:<\/p>\n\n\n\n<ol><li>Using While Loop<\/li><li>Using For Loop&nbsp;<\/li><\/ol>\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-662c76abdcc6f\" 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-662c76abdcc6f\" 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\/c-program-to-find-strong-number\/#C_Program_to_Find_Strong_Number\" title=\"C Program to Find Strong Number\">C Program to Find Strong 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\/c-program-to-find-strong-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\/c-program-to-find-strong-number\/#C_Program_to_Check_Strong_Number_Using_For_Loop\" title=\"C Program to Check Strong Number Using For Loop\">C Program to Check Strong 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-4\" href=\"https:\/\/www.codingbroz.com\/c-program-to-find-strong-number\/#Conclusion\" title=\"Conclusion\">Conclusion<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"C_Program_to_Find_Strong_Number\"><\/span><strong>C Program to Find Strong Number<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"c\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ C Program to Check Strong Number Using While Loop\n#include &lt;stdio.h>\nint main(){\n    int n, i, rem, temp, fact, sum = 0;\n    \n    \/\/ Asking for input\n    printf(\"Enter a number to check strong number: \");\n    scanf(\"%d\", &amp;n);\n    \n    temp = n;\n    while (temp > 0){\n        i = 1, fact = 1;\n        rem = temp % 10;\n        \n        while (i &lt;= rem){\n            fact = fact * i;\n            i++;\n        }\n        sum = sum + fact;\n        temp = temp \/ 10;\n    }\n    \n    \/\/ Displaying output\n    if (n == sum){\n        printf(\"%d is a strong number.\", n);\n    }\n    else {\n        printf(\"%d is not a strong number.\", n);\n    }\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 a number to check strong number: 145\r\n145 is a strong number.\r<\/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<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"c\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">    int n, i, rem, temp, fact, sum = 0;\n<\/pre>\n\n\n\n<p>In this program, we have declared <strong>six integer data type<\/strong> variables named <strong>n<\/strong>,<strong> i<\/strong>, <strong>rem<\/strong>, <strong>temp<\/strong>, <strong>fact<\/strong> and <strong>sum<\/strong>.<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"c\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">    \/\/ Asking for input\n    printf(\"Enter a number to check strong number: \");\n    scanf(\"%d\", &amp;n);\n<\/pre>\n\n\n\n<p>Now, the user is asked to enter a number to check for a strong number.<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"c\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">    temp = n;\n    while (temp > 0){\n        i = 1, fact = 1;\n        rem = temp % 10;\n        \n        while (i &lt;= rem){\n            fact = fact * i;\n            i++;\n        }\n        sum = sum + fact;\n        temp = temp \/ 10;\n    }\n<\/pre>\n\n\n\n<p>We have taken the help of a <strong>while loop<\/strong> to calculate the sum of the factorials of the digits.<\/p>\n\n\n\n<p>Suppose, the user enters a number <em>145<\/em>, then:<\/p>\n\n\n\n<ul><li><strong>1st While Loop Iteration:<\/strong> <strong>(145 > 0)<\/strong>, here the condition is <strong>True<\/strong>. So, the loop continues. . .\u00a0<\/li><li>rem = temp % 10 = 145 % 10 = 5<ul><li><strong>1st i While Loop Iteration:<\/strong> (1 &lt;= 5), here the condition is True.<\/li><li>fact = fact * i = 1 * 1 = 1<\/li><li><strong>2nd i While Loop Iteration:<\/strong> (2 &lt;= 5), here the condition is True.<\/li><li>fact = fact * i = 1 * 2 = 2<\/li><li><strong>3rd i While Loop Iteration:<\/strong> (3 &lt;= 5), here the condition is True.<\/li><li>fact = fact * i =\u00a0 2 * 3 = 6<\/li><li><strong>4th i While Loop Iteration:<\/strong> (4 &lt;= 5), here the condition is also True.<\/li><li>fact = fact * i = 6 * 4 = 24<\/li><li><strong>5th i While Loop Iteration:<\/strong> (5 &lt;= 5), here the condition is True.<\/li><li>fact = fact * i = 24 * 5 = 120<\/li><li><strong>6th i while loop Iteration:<\/strong> (6 &lt;= 5), here the condition is False, so this loop terminates.<\/li><\/ul><\/li><\/ul>\n\n\n\n<p>sum = sum + fact = 0 + 120 = <strong>120<\/strong><br>temp = temp \/ 10 = 145 \/ 10 = 14<\/p>\n\n\n\n<ul><li><strong>2nd While Loop Iteration:<\/strong> <strong>(14 > 0)<\/strong>, here the condition is <strong>True<\/strong>. So, the loop continues. . .\u00a0<\/li><li>rem = temp % 10 = 14 % 10 = <strong>4<\/strong><ul><li><strong>1st i While Loop Iteration:<\/strong> (1 &lt;= 4), here the condition is True.<\/li><li>fact = fact * i = 1 * 1 = 1<\/li><li><strong>2nd i While Loop Iteration:<\/strong> (2 &lt;= 4), here the condition is True.<\/li><li>fact = fact * i = 1 * 2 = 2<\/li><li><strong>3rd i While Loop Iteration:<\/strong> (3 &lt;= 4), here the condition is True.<\/li><li>fact = fact * i =\u00a0 2 * 3 = 6<\/li><li><strong>4th i While Loop Iteration:<\/strong> (4 &lt;= 4), here the condition is also True.<\/li><li>fact = fact * i = 6 * 4 = 24<\/li><li><strong>5th i while loop Iteration:<\/strong> (5 &lt;= 4), here the condition is False, so this loop terminates.<\/li><\/ul><\/li><\/ul>\n\n\n\n<p>And we get: sum = sum + fact = 120 + 24 = <strong>144<\/strong><br>temp = temp \/ 10 = 14 \/ 10 = 1<\/p>\n\n\n\n<ul><li><strong>3rd While Loop Iteration:<\/strong> <strong>(1 > 0)<\/strong>, here the condition is <strong>True<\/strong>. So, the loop continues. . .\u00a0<\/li><li>rem = temp % 10 = 1 % 10 = 1<ul><li><strong>1st i While Loop Iteration:<\/strong> (1 &lt;= 1), here the condition is True.<\/li><li>fact = fact * i = 1 * 1 = 1<\/li><li><strong>2nd i While Loop Iteration:<\/strong> (2 &lt;= 1), here the condition is False, so the loop terminates and we get:<\/li><\/ul><\/li><\/ul>\n\n\n\n<p>sum = sum + fact = 144 + 1 =<strong> 145<\/strong><br>temp = temp \/ 10 = 1 \/ 10 = 0<\/p>\n\n\n\n<ul><li><strong>4th While Loop Iteration: (0 > 0)<\/strong>, here the condition is <strong>False<\/strong>, so the while loop terminates and we get <strong>sum = 145<\/strong>.<\/li><\/ul>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"c\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">    \/\/ Displaying output\n    if (n == sum){\n        printf(\"%d is a strong number.\", n);\n    }\n    else {\n        printf(\"%d is not a strong number.\", n);\n    }\n<\/pre>\n\n\n\n<p>Now, we check whether the sum is equal to the original number or not. If yes, then the entered number is a strong number otherwise the entered number is not a strong number.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"C_Program_to_Check_Strong_Number_Using_For_Loop\"><\/span><strong>C Program to Check Strong Number Using For Loop<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"c\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ C Program to Check Strong Number Using For Loop\n#include &lt;stdio.h>\nint main(){\n    int number, i, rem, temp, fact, sum = 0;\n    \n    \/\/ Asking for input\n    printf(\"Enter a number to check strong number: \");\n    scanf(\"%d\", &amp;number);\n    \n    \/\/ Calculating the sum of factorials\n    temp = number;\n    for (temp = number; temp > 0; temp \/= 10){\n        fact = 1;\n        rem = temp % 10;\n        \n        for (i = 1; i &lt;= rem; i++){\n            fact = fact * i;\n        }\n        sum = sum + fact;\n    }\n    \n    \/\/ Displaying output\n    if (number == sum){\n        printf(\"%d is a strong number.\", number);\n    }\n    else {\n        printf(\"%d is not a strong number.\", number);\n    }\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 a number to check strong number: 40585\r\n40585 is a strong number.\r<\/code><\/pre>\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 check and find strong numbers using the 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\/c-program-to-find-grade-of-a-student\/\">C Program To Find Grade of a Student<\/a><\/strong><\/li><li><strong><a href=\"https:\/\/www.codingbroz.com\/c-program-to-find-modulus-of-two-numbers\/\">C Program To Find Modulus of Two Numbers<\/a><\/strong><\/li><li><strong><a href=\"https:\/\/www.codingbroz.com\/c-program-to-calculate-average-using-arrays\/\">C Program To Calculate Average Using Arrays<\/a><\/strong><\/li><li><strong><a href=\"https:\/\/www.codingbroz.com\/c-program-to-print-1-to-100-without-using-loop\/\">C Program To Print 1 To 100 Without Using Loop<\/a><\/strong><\/li><li><strong><a href=\"https:\/\/www.codingbroz.com\/c-program-to-find-the-roots-of-a-quadratic-equation\/\">C Program To Find The Roots of a Quadratic Equation<\/a><\/strong><\/li><\/ul>\n","protected":false},"excerpt":{"rendered":"<p>In this post, we will learn how to check and find strong numbers using the C Programming language. But first let\u2019s learn about strong numbers.<\/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 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":[167,294],"tags":[625,206],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/posts\/5775"}],"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\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/comments?post=5775"}],"version-history":[{"count":4,"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/posts\/5775\/revisions"}],"predecessor-version":[{"id":5781,"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/posts\/5775\/revisions\/5781"}],"wp:attachment":[{"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/media?parent=5775"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/categories?post=5775"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/tags?post=5775"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}