{"id":5314,"date":"2024-03-14T02:41:29","date_gmt":"2024-03-14T02:41:29","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/what-is-the-method-to-remove-duplicate-characters-in-the-c-programming-language\/"},"modified":"2025-08-01T13:27:33","modified_gmt":"2025-08-01T13:27:33","slug":"what-is-the-method-to-remove-duplicate-characters-in-the-c-programming-language","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/what-is-the-method-to-remove-duplicate-characters-in-the-c-programming-language\/","title":{"rendered":"Remove Duplicate Characters in C"},"content":{"rendered":"<p>The method of deleting duplicate characters in C language can be achieved through the following steps:<\/p>\n<ol>\n<li>Create a new string to store the result after removing duplicate characters.<\/li>\n<li>Iterate through each character of the original string and check if the character already exists in the new string.<\/li>\n<li>If the character does not exist in the new string, then add the character to the new string.<\/li>\n<li>The final output will be the result of removing any duplicate characters.<\/li>\n<\/ol>\n<p>Here is a simple example code in C language:<\/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<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;string.h&gt;<\/span><\/span>\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-type\">char<\/span> str[<span class=\"hljs-number\">100<\/span>];\r\n    <span class=\"hljs-type\">char<\/span> result[<span class=\"hljs-number\">100<\/span>];\r\n    <span class=\"hljs-type\">int<\/span> i, j, flag;\r\n\r\n    <span class=\"hljs-built_in\">printf<\/span>(<span class=\"hljs-string\">\"Enter a string: \"<\/span>);\r\n    fgets(str, <span class=\"hljs-keyword\">sizeof<\/span>(str), <span class=\"hljs-built_in\">stdin<\/span>);\r\n\r\n    <span class=\"hljs-comment\">\/\/ Remove duplicate characters<\/span>\r\n    <span class=\"hljs-keyword\">for<\/span> (i = <span class=\"hljs-number\">0<\/span>; i &lt; <span class=\"hljs-built_in\">strlen<\/span>(str); i++) {\r\n        flag = <span class=\"hljs-number\">0<\/span>;\r\n        <span class=\"hljs-keyword\">for<\/span> (j = <span class=\"hljs-number\">0<\/span>; j &lt; <span class=\"hljs-built_in\">strlen<\/span>(result); j++) {\r\n            <span class=\"hljs-keyword\">if<\/span> (str[i] == result[j]) {\r\n                flag = <span class=\"hljs-number\">1<\/span>;\r\n                <span class=\"hljs-keyword\">break<\/span>;\r\n            }\r\n        }\r\n        <span class=\"hljs-keyword\">if<\/span> (!flag) {\r\n            result[<span class=\"hljs-built_in\">strlen<\/span>(result)] = str[i];\r\n        }\r\n    }\r\n\r\n    <span class=\"hljs-built_in\">printf<\/span>(<span class=\"hljs-string\">\"String after removing duplicates: %s\\n\"<\/span>, result);\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 code loops through the original string, compares each character one by one, and adds non-repeating characters to a new string, ultimately outputting the result after removing duplicates.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The method of deleting duplicate characters in C language can be achieved through the following steps: Create a new string to store the result after removing duplicate characters. Iterate through each character of the original string and check if the character already exists in the new string. If the character does not exist in the [&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":[4733,5767,381,5766,276],"class_list":["post-5314","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-algorithm","tag-c-code","tag-c-programming","tag-duplicate-characters","tag-string-manipulation"],"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>Remove Duplicate Characters in C - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"Learn efficient methods to remove duplicate characters in C programming with step-by-step code examples.\" \/>\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\/what-is-the-method-to-remove-duplicate-characters-in-the-c-programming-language\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Remove Duplicate Characters in C\" \/>\n<meta property=\"og:description\" content=\"Learn efficient methods to remove duplicate characters in C programming with step-by-step code examples.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/blog\/what-is-the-method-to-remove-duplicate-characters-in-the-c-programming-language\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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