{"id":1444,"date":"2020-02-23T07:00:34","date_gmt":"2020-02-23T07:00:34","guid":{"rendered":"https:\/\/golangbyexamples.com\/?p=1444"},"modified":"2020-02-23T07:19:44","modified_gmt":"2020-02-23T07:19:44","slug":"check-if-string-is-number-golang","status":"publish","type":"post","link":"https:\/\/golangbyexamples.com\/check-if-string-is-number-golang\/","title":{"rendered":"Check if a string is a number in Go (Golang)"},"content":{"rendered":"\n<p class=\"has-medium-font-size\"><strong>strconv.Atoi()<\/strong> function can be used to check if the string is a number. If this function returns an error if the passed string is not a number. This function parses the number to base 10<\/p>\n\n\n\n<p class=\"has-medium-font-size\"><a href=\"https:\/\/golang.org\/pkg\/strconv\/#Atoi\">https:\/\/golang.org\/pkg\/strconv\/#Atoi<\/a><\/p>\n\n\n\n<p class=\"has-medium-font-size\">Signature of the function is <\/p>\n\n\n\n<pre class=\"wp-block-prismatic-blocks\"><code class=\"language-\">func Atoi(s string) (int, error)<\/code><\/pre>\n\n\n\n<p class=\"has-medium-font-size\"><strong>Working Code:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-prismatic-blocks\"><code class=\"language-go\">package main\n\nimport (\n    \"fmt\"\n    \"strconv\"\n)\nfunc main() {\n    x := \"1234\"\n    val, err := strconv.Atoi(x)\n    if err != nil {\n        fmt.Printf(\"Supplied value %s is not a number\\n\", x)\n    } else {\n        fmt.Printf(\"Supplied value %s is a number with value %d\\n\", x, val)\n    }\n\n    y := \"123b\"\n    val, err = strconv.Atoi(y)\n    if err != nil {\n        fmt.Printf(\"Supplied value %s is not a number\\n\", y)\n    } else {\n        fmt.Printf(\"Supplied value %s is a number with value %d\\n\", y, val)\n    }\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\">Supplied value 1234 is a number with value 1234\nSupplied value 123b is not a number<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>strconv.Atoi() function can be used to check if the string is a number. If this function returns an error if the passed string is not a number. This function parses the number&#8230;<\/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-1444","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>Check if a string is a number 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\/check-if-string-is-number-golang\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Check if a string is a number in Go (Golang) - Welcome To Golang By Example\" \/>\n<meta property=\"og:description\" content=\"strconv.Atoi() function can be used to check if the string is a number. 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