{"id":6160,"date":"2021-08-18T16:43:26","date_gmt":"2021-08-18T11:13:26","guid":{"rendered":"https:\/\/golangbyexamples.com\/?p=6160"},"modified":"2021-08-18T16:44:13","modified_gmt":"2021-08-18T11:14:13","slug":"implement-your-own-atoi-function-golang","status":"publish","type":"post","link":"https:\/\/golangbyexamples.com\/implement-your-own-atoi-function-golang\/","title":{"rendered":"Implement your own Atoi function in Go (Golang)"},"content":{"rendered":"\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_17 counter-hierarchy counter-decimal ez-toc-light-blue\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" style=\"display: none;\"><i class=\"ez-toc-glyphicon ez-toc-icon-toggle\"><\/i><\/a><\/span><\/div>\n<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:\/\/golangbyexamples.com\/implement-your-own-atoi-function-golang\/#Overview\" title=\"Overview\">Overview<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-2\"><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/golangbyexamples.com\/implement-your-own-atoi-function-golang\/#Program\" title=\"Program\">Program<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"has-large-font-size wp-block-heading\"><span class=\"ez-toc-section\" id=\"Overview\"><\/span><strong>Overview<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"has-medium-font-size\"><strong>Atoi<\/strong> function converts a given string into its number representation.\u00a0 For eg<\/p>\n\n\n\n<pre class=\"wp-block-prismatic-blocks\"><code class=\"language-go\">Input: \"121\"\nOutput: 121\n\nInput: \"-121\"\nOutput: 121\n\nInput: \"0\"\nOutput: 0<\/code><\/pre>\n\n\n\n<h2 class=\"has-large-font-size wp-block-heading\"><span class=\"ez-toc-section\" id=\"Program\"><\/span><strong>Program<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"has-medium-font-size\">Below is the program for the same.<\/p>\n\n\n\n<pre class=\"wp-block-prismatic-blocks\"><code class=\"language-go\">package main\n\nimport (\n\t\"fmt\"\n\t\"strconv\"\n)\n\nfunc main() {\n\toutput := myAtoi(\"121\")\n\tfmt.Println(output)\n\n\toutput = myAtoi(\"-121\")\n\tfmt.Println(output)\n\n\toutput = myAtoi(\"0\")\n\tfmt.Println(output)\n}\n\nfunc myAtoi(s string) int {\n\n\tvar output int\n\n\tsign := \"positive\"\n\tif string(s[0]) == \"-\" {\n\t\tsign = \"negtive\"\n\t\ts = s[1:]\n\t} else if string(s[0]) == \"+\" {\n\t\ts = s[1:]\n\t}\n\n\tstringLen := len(s)\n\n\tfor i := 0; i < stringLen; i++ {\n\t\ttempNum, _ := strconv.Atoi(string(s[i]))\n\t\toutput = output*10 + tempNum\n\t}\n\n\tif sign == \"negtive\" {\n\t\toutput = output * -1\n\t}\n\n\treturn output\n}<\/code><\/pre>\n\n\n\n<p class=\"has-medium-font-size\"><strong>Output<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-prismatic-blocks\"><code class=\"language-go\">121\n-121\n0<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>Table of Contents OverviewProgram Overview Atoi function converts a given string into its number representation.\u00a0 For eg Program Below is the program for the same. Output<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":"","footnotes":"","jetpack_publicize_message":"","jetpack_is_tweetstorm":false},"categories":[1],"tags":[3,4],"class_list":["post-6160","post","type-post","status-publish","format-standard","hentry","category-tech","tag-go","tag-golang"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.7 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Implement your own Atoi function in Go (Golang) - Welcome To Golang By Example<\/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:\/\/golangbyexamples.com\/implement-your-own-atoi-function-golang\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Implement your own Atoi function in Go (Golang) - Welcome To Golang By Example\" \/>\n<meta property=\"og:description\" content=\"Table of Contents OverviewProgram Overview Atoi function converts a given string into its number representation.\u00a0 For eg Program Below is the program for the same. 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