{"id":10677,"date":"2024-03-14T12:33:18","date_gmt":"2024-03-14T12:33:18","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/how-can-c-language-output-all-prime-numbers-within-100\/"},"modified":"2025-08-04T02:29:57","modified_gmt":"2025-08-04T02:29:57","slug":"how-can-c-language-output-all-prime-numbers-within-100","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/how-can-c-language-output-all-prime-numbers-within-100\/","title":{"rendered":"C Program: Print Prime Numbers Under 100"},"content":{"rendered":"<p>This is a program written in the C language that prints all prime numbers below 100.<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;stdio.h&gt;<\/span><\/span>\r\n\r\n<span class=\"hljs-type\">int<\/span> <span class=\"hljs-title function_\">isPrime<\/span><span class=\"hljs-params\">(<span class=\"hljs-type\">int<\/span> num)<\/span> {\r\n    <span class=\"hljs-keyword\">if<\/span> (num &lt; <span class=\"hljs-number\">2<\/span>) {\r\n        <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-number\">0<\/span>;\r\n    }\r\n    <span class=\"hljs-keyword\">for<\/span> (<span class=\"hljs-type\">int<\/span> i = <span class=\"hljs-number\">2<\/span>; i * i &lt;= num; i++) {\r\n        <span class=\"hljs-keyword\">if<\/span> (num % i == <span class=\"hljs-number\">0<\/span>) {\r\n            <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-number\">0<\/span>;\r\n        }\r\n    }\r\n    <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-number\">1<\/span>;\r\n}\r\n\r\n<span class=\"hljs-type\">int<\/span> <span class=\"hljs-title function_\">main<\/span><span class=\"hljs-params\">()<\/span> {\r\n    <span class=\"hljs-built_in\">printf<\/span>(<span class=\"hljs-string\">\"Prime numbers between 1 and 100 are: \\n\"<\/span>);\r\n    \r\n    <span class=\"hljs-keyword\">for<\/span> (<span class=\"hljs-type\">int<\/span> i = <span class=\"hljs-number\">2<\/span>; i &lt;= <span class=\"hljs-number\">100<\/span>; i++) {\r\n        <span class=\"hljs-keyword\">if<\/span> (isPrime(i)) {\r\n            <span class=\"hljs-built_in\">printf<\/span>(<span class=\"hljs-string\">\"%d \"<\/span>, i);\r\n        }\r\n    }\r\n    \r\n    <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-number\">0<\/span>;\r\n}\r\n<\/code><\/pre>\n<p>This program first defines a function called isPrime() to check if a number is prime. Then, in the main function, it iterates through all integers from 2 to 100, and if a number is prime, it will be output. The program will eventually output all prime numbers within 100.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>This is a program written in the C language that prints all prime numbers below 100. #include &lt;stdio.h&gt; int isPrime(int num) { if (num &lt; 2) { return 0; } for (int i = 2; i * i &lt;= num; i++) { if (num % i == 0) { return 0; } } return 1; [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[7899,5767,381,13440,13439],"class_list":["post-10677","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-algorithms","tag-c-code","tag-c-programming","tag-coding-example","tag-prime-numbers"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>C Program: Print Prime Numbers Under 100 - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"Learn how to write a C program that prints all prime numbers under 100. Includes optimized code and step-by-step explanation.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/blog\/how-can-c-language-output-all-prime-numbers-within-100\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"C Program: Print Prime Numbers Under 100\" \/>\n<meta property=\"og:description\" content=\"Learn how to write a C program that prints all prime numbers under 100. 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