{"id":13265,"date":"2024-03-15T06:43:13","date_gmt":"2024-03-15T06:43:13","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/how-to-use-the-standard-log-library-in-golang\/"},"modified":"2025-08-05T15:09:32","modified_gmt":"2025-08-05T15:09:32","slug":"how-to-use-the-standard-log-library-in-golang","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/how-to-use-the-standard-log-library-in-golang\/","title":{"rendered":"Golang Log Library: A Practical Guide"},"content":{"rendered":"

The log standard library in Golang can be used for logging purposes. Here are some common operations when using the log standard library.<\/p>\n

    \n
  1. Import the log package.<\/li>\n<\/ol>\n
    import<\/span> \"log\"<\/span>\r\n<\/code><\/pre>\n
      \n
    1. Use the Println function to log information:<\/li>\n<\/ol>\n
      log.Println(\"This is a log message\"<\/span>)\r\n<\/code><\/pre>\n
        \n
      1. Format log information using the Printf function.<\/li>\n<\/ol>\n
        log.Printf(\"This is a log message with a formatted string: %s\"<\/span>, \"Hello World\"<\/span>)\r\n<\/code><\/pre>\n
          \n
        1. Set the prefix for logging output:<\/li>\n<\/ol>\n
          log.SetPrefix(\"LOG: \"<\/span>)\r\nlog.Println(\"This is a log message with prefix\"<\/span>)\r\n<\/code><\/pre>\n
            \n
          1. Set the time format for logging output:<\/li>\n<\/ol>\n
            log.SetFlags(log.Ldate | log.Ltime)\r\nlog.Println(\"This is a log message with timestamp\"<\/span>)\r\n<\/code><\/pre>\n
              \n
            1. Output logs to a file:<\/li>\n<\/ol>\n
              file, err := os.OpenFile(\"logfile.log\"<\/span>, os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666<\/span>)\r\nif<\/span> err != nil<\/span> {\r\n    log.Fatal(err)\r\n}\r\ndefer<\/span> file.Close()\r\n\r\nlog.SetOutput(file)\r\nlog.Println(\"This is a log message that will be written to the file\"<\/span>)\r\n<\/code><\/pre>\n
              Here are some basic operations using the log standard library. You can use more log library functions based on your actual needs. Please note that the log standard library by default outputs to standard error stream, you can use the log.SetOutput function to redirect the log output to other places.<\/p>\n","protected":false},"excerpt":{"rendered":"
              The log standard library in Golang can be used for logging purposes. Here are some common operations when using the log standard library. Import the log package. import “log” Use the Println function to log information: log.Println(“This is a log message”) Format log information using the Printf function. log.Printf(“This is a log message with a […]<\/p>\n","protected":false},"author":8,"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":[17636,9772,17637,2703,10505],"class_list":["post-13265","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-go-log","tag-golang","tag-log-package","tag-logging","tag-standard-library"],"yoast_head":"\nGolang Log Library: A Practical Guide - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"Learn to use Golang's standard log library effectively. Covers Println, Printf prefixes & common logging operations.\" \/>\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-to-use-the-standard-log-library-in-golang\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Golang Log Library: A Practical Guide\" \/>\n<meta property=\"og:description\" content=\"Learn to use Golang's standard log library effectively. Covers Println, Printf prefixes & common logging operations.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/blog\/how-to-use-the-standard-log-library-in-golang\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/SiliCloudGlobal\/\" \/>\n<meta property=\"article:published_time\" content=\"2024-03-15T06:43:13+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-08-05T15:09:32+00:00\" \/>\n<meta name=\"author\" content=\"William Carter\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@SiliCloudGlobal\" \/>\n<meta name=\"twitter:site\" content=\"@SiliCloudGlobal\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"William Carter\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-use-the-standard-log-library-in-golang\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-use-the-standard-log-library-in-golang\/\"},\"author\":{\"name\":\"William Carter\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/f697031891aacefc4b681d139781d3c0\"},\"headline\":\"Golang Log Library: A Practical Guide\",\"datePublished\":\"2024-03-15T06:43:13+00:00\",\"dateModified\":\"2025-08-05T15:09:32+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-use-the-standard-log-library-in-golang\/\"},\"wordCount\":116,\"publisher\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/#organization\"},\"keywords\":[\"go log\",\"Golang\",\"log package\",\"Logging\",\"standard library\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-use-the-standard-log-library-in-golang\/\",\"url\":\"https:\/\/www.silicloud.com\/blog\/how-to-use-the-standard-log-library-in-golang\/\",\"name\":\"Golang Log Library: A Practical Guide - Blog - Silicon Cloud\",\"isPartOf\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/#website\"},\"datePublished\":\"2024-03-15T06:43:13+00:00\",\"dateModified\":\"2025-08-05T15:09:32+00:00\",\"description\":\"Learn to use Golang's standard log library effectively. Covers Println, Printf prefixes & common logging operations.\",\"breadcrumb\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-use-the-standard-log-library-in-golang\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.silicloud.com\/blog\/how-to-use-the-standard-log-library-in-golang\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-use-the-standard-log-library-in-golang\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.silicloud.com\/blog\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Golang Log Library: A Practical Guide\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#website\",\"url\":\"https:\/\/www.silicloud.com\/blog\/\",\"name\":\"Silicon Cloud Blog\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/#organization\"},\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#organization\",\"name\":\"Silicon Cloud Blog\",\"url\":\"https:\/\/www.silicloud.com\/blog\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/www.silicloud.com\/blog\/wp-content\/uploads\/2023\/11\/EN-SILICON-Full.png\",\"contentUrl\":\"https:\/\/www.silicloud.com\/blog\/wp-content\/uploads\/2023\/11\/EN-SILICON-Full.png\",\"width\":1024,\"height\":1024,\"caption\":\"Silicon Cloud Blog\"},\"image\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/logo\/image\/\"},\"sameAs\":[\"https:\/\/www.facebook.com\/SiliCloudGlobal\/\",\"https:\/\/twitter.com\/SiliCloudGlobal\"]},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/f697031891aacefc4b681d139781d3c0\",\"name\":\"William Carter\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/1786698071dd8d74bec894b512f9e3c610c3a2a32985f67e688976cee3c8bbef?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/1786698071dd8d74bec894b512f9e3c610c3a2a32985f67e688976cee3c8bbef?s=96&d=mm&r=g\",\"caption\":\"William Carter\"},\"url\":\"https:\/\/www.silicloud.com\/blog\/author\/williamcarter\/\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Golang Log Library: A Practical Guide - Blog - Silicon Cloud","description":"Learn to use Golang's standard log library effectively. Covers Println, Printf prefixes & common logging operations.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.silicloud.com\/blog\/how-to-use-the-standard-log-library-in-golang\/","og_locale":"en_US","og_type":"article","og_title":"Golang Log Library: A Practical Guide","og_description":"Learn to use Golang's standard log library effectively. Covers Println, Printf prefixes & common logging operations.","og_url":"https:\/\/www.silicloud.com\/blog\/how-to-use-the-standard-log-library-in-golang\/","og_site_name":"Blog - Silicon Cloud","article_publisher":"https:\/\/www.facebook.com\/SiliCloudGlobal\/","article_published_time":"2024-03-15T06:43:13+00:00","article_modified_time":"2025-08-05T15:09:32+00:00","author":"William Carter","twitter_card":"summary_large_image","twitter_creator":"@SiliCloudGlobal","twitter_site":"@SiliCloudGlobal","twitter_misc":{"Written by":"William Carter","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.silicloud.com\/blog\/how-to-use-the-standard-log-library-in-golang\/#article","isPartOf":{"@id":"https:\/\/www.silicloud.com\/blog\/how-to-use-the-standard-log-library-in-golang\/"},"author":{"name":"William Carter","@id":"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/f697031891aacefc4b681d139781d3c0"},"headline":"Golang Log Library: A Practical Guide","datePublished":"2024-03-15T06:43:13+00:00","dateModified":"2025-08-05T15:09:32+00:00","mainEntityOfPage":{"@id":"https:\/\/www.silicloud.com\/blog\/how-to-use-the-standard-log-library-in-golang\/"},"wordCount":116,"publisher":{"@id":"https:\/\/www.silicloud.com\/blog\/#organization"},"keywords":["go log","Golang","log package","Logging","standard library"],"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/www.silicloud.com\/blog\/how-to-use-the-standard-log-library-in-golang\/","url":"https:\/\/www.silicloud.com\/blog\/how-to-use-the-standard-log-library-in-golang\/","name":"Golang Log Library: A Practical Guide - Blog - Silicon Cloud","isPartOf":{"@id":"https:\/\/www.silicloud.com\/blog\/#website"},"datePublished":"2024-03-15T06:43:13+00:00","dateModified":"2025-08-05T15:09:32+00:00","description":"Learn to use Golang's standard log library effectively. Covers Println, Printf prefixes & common logging operations.","breadcrumb":{"@id":"https:\/\/www.silicloud.com\/blog\/how-to-use-the-standard-log-library-in-golang\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.silicloud.com\/blog\/how-to-use-the-standard-log-library-in-golang\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.silicloud.com\/blog\/how-to-use-the-standard-log-library-in-golang\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.silicloud.com\/blog\/"},{"@type":"ListItem","position":2,"name":"Golang Log Library: A Practical Guide"}]},{"@type":"WebSite","@id":"https:\/\/www.silicloud.com\/blog\/#website","url":"https:\/\/www.silicloud.com\/blog\/","name":"Silicon Cloud Blog","description":"","publisher":{"@id":"https:\/\/www.silicloud.com\/blog\/#organization"},"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/www.silicloud.com\/blog\/#organization","name":"Silicon Cloud Blog","url":"https:\/\/www.silicloud.com\/blog\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.silicloud.com\/blog\/#\/schema\/logo\/image\/","url":"https:\/\/www.silicloud.com\/blog\/wp-content\/uploads\/2023\/11\/EN-SILICON-Full.png","contentUrl":"https:\/\/www.silicloud.com\/blog\/wp-content\/uploads\/2023\/11\/EN-SILICON-Full.png","width":1024,"height":1024,"caption":"Silicon Cloud Blog"},"image":{"@id":"https:\/\/www.silicloud.com\/blog\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/SiliCloudGlobal\/","https:\/\/twitter.com\/SiliCloudGlobal"]},{"@type":"Person","@id":"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/f697031891aacefc4b681d139781d3c0","name":"William Carter","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/1786698071dd8d74bec894b512f9e3c610c3a2a32985f67e688976cee3c8bbef?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/1786698071dd8d74bec894b512f9e3c610c3a2a32985f67e688976cee3c8bbef?s=96&d=mm&r=g","caption":"William Carter"},"url":"https:\/\/www.silicloud.com\/blog\/author\/williamcarter\/"}]}},"_links":{"self":[{"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/posts\/13265","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/comments?post=13265"}],"version-history":[{"count":3,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/posts\/13265\/revisions"}],"predecessor-version":[{"id":157206,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/posts\/13265\/revisions\/157206"}],"wp:attachment":[{"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/media?parent=13265"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/categories?post=13265"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/tags?post=13265"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}