{"id":1062,"date":"2020-01-01T17:53:13","date_gmt":"2020-01-01T17:53:13","guid":{"rendered":"https:\/\/golangbyexamples.com\/?p=1062"},"modified":"2020-01-01T17:53:25","modified_gmt":"2020-01-01T17:53:25","slug":"go-size-range-int-uint","status":"publish","type":"post","link":"https:\/\/golangbyexamples.com\/go-size-range-int-uint\/","title":{"rendered":"Know Size and Range of int or uint 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-1\"><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/golangbyexamples.com\/go-size-range-int-uint\/#Overview\" title=\"Overview\">Overview<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-1\"><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/golangbyexamples.com\/go-size-range-int-uint\/#Know_Size_and_Range\" title=\"Know Size and Range\">Know Size and Range<\/a><\/li><\/ul><\/nav><\/div>\n<h1 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Overview\"><\/span><strong>Overview<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h1>\n\n\n\n<ul class=\"has-medium-font-size wp-block-list\"><li>int is a signed Integer data type<\/li><\/ul>\n\n\n\n<ul class=\"has-medium-font-size wp-block-list\"><li>uint is an unsigned Integer data type <\/li><\/ul>\n\n\n\n<p class=\"has-medium-font-size\">Size and range of <strong>int<\/strong> and <strong>uint<\/strong> in go is platform-dependent meaning that the size and range depend whether the underlying platform is 32-bit or a 64-bit machine.<\/p>\n\n\n\n<p class=\"has-medium-font-size\"><strong>Size Table<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table class=\"has-subtle-pale-blue-background-color has-background\"><tbody><tr><td><strong>Type<\/strong><\/td><td><strong>Size (32 bit machine)<\/strong><\/td><td><strong>Size (64 bit machine)<\/strong><\/td><\/tr><tr><td>int<\/td><td>32 bits or 4 byte<\/td><td>64 bits or 8 byte<\/td><\/tr><tr><td>uint<\/td><td>32 bits or 4 byte<\/td><td>64 bits or 8 byte<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>Range Table<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table class=\"has-subtle-pale-blue-background-color has-background\"><tbody><tr><td><strong>Type<\/strong><\/td><td><strong>Size (32 bit machine)<\/strong><\/td><td><strong>Size (64 bit machine)<\/strong><\/td><\/tr><tr><td>int<\/td><td>-2<sup>31<\/sup>&nbsp;to 2<sup>31<\/sup>&nbsp;-1<\/td><td>-2<sup>63<\/sup>&nbsp;to 2<sup>63<\/sup>&nbsp;-1<\/td><\/tr><tr><td>uint<\/td><td>0 to 2<sup>32<\/sup>&nbsp;-1<\/td><td>0 to 2<sup>64<\/sup>&nbsp;-1<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h1 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Know_Size_and_Range\"><\/span><strong>Know Size and Range<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h1>\n\n\n\n<ul class=\"has-medium-font-size wp-block-list\"><li><strong>bits <\/strong>package of golang can help know the size of an <strong>int <\/strong>or <strong>uint <\/strong>on your system. <strong>bits.UintSize<\/strong> is the const that stores this value. It is calculated as below<\/li><\/ul>\n\n\n\n<pre class=\"wp-block-prismatic-blocks\"><code class=\"language-go\">const uintSize = 32 << (^uint(0) >> 32 & 1) \/\/ 32 or 64<\/code><\/pre>\n\n\n\n<ul class=\"has-medium-font-size wp-block-list\"><li><strong>unsafe.Sizeof() <\/strong>function can also be used to see the size of <strong>int <\/strong>or<strong> unit<\/strong> in bytes<\/li><\/ul>\n\n\n\n<p class=\"has-medium-font-size\">Once the size is known, the range can be deduced based upon size. See the below code for printing size.<\/p>\n\n\n\n<pre class=\"wp-block-prismatic-blocks\"><code class=\"language-go\">package main\n\nimport (\n    \"fmt\"\n    \"math\/bits\"\n    \"unsafe\"\n)\n\nfunc main() {\n    \/\/This is computed as \n    \/\/const uintSize = 32 << (^uint(0) >> 32 & 1) \/\/ 32 or 64\n    sizeInBits := bits.UintSize\n    fmt.Printf(\"%d bits\\n\", sizeInBits)\n\n    \/\/Using unsafe.Sizeof() function. It will print size in bytes\n    var a int\n    fmt.Printf(\"%d bytes\\n\", unsafe.Sizeof(a))\n\n    \/\/Using unsafe.Sizeof() function. It will print size in bytes\n    var b uint\n    fmt.Printf(\"%d bytes\\n\", unsafe.Sizeof(b))\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\">64 bits\n8 bytes\n8 bytes<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>Table of Contents OverviewKnow Size and Range Overview int is a signed Integer data type uint is an unsigned Integer data type Size and range of int and uint in go is&#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":[3,4,135,134,136],"class_list":["post-1062","post","type-post","status-publish","format-standard","hentry","category-tech","tag-go","tag-golang","tag-int","tag-range","tag-uint"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.7 - 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