{"id":4136,"date":"2020-09-30T22:19:12","date_gmt":"2020-09-30T16:49:12","guid":{"rendered":"https:\/\/golangbyexamples.com\/?p=4136"},"modified":"2020-09-30T22:19:22","modified_gmt":"2020-09-30T16:49:22","slug":"constant-array-golang","status":"publish","type":"post","link":"https:\/\/golangbyexamples.com\/constant-array-golang\/","title":{"rendered":"Constant array or slice 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\/constant-array-golang\/#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\/constant-array-golang\/#Example\" title=\"Example\">Example<\/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<p class=\"has-medium-font-size\">Go only supports four types of constant<\/p>\n\n\n\n<ul class=\"has-medium-font-size wp-block-list\"><li>Numeric ( int, int64, float, float64, complex128 etc)<\/li><li>String<\/li><li>Character or rune<\/li><li>Boolean<\/li><\/ul>\n\n\n\n<p class=\"has-medium-font-size\">Go doesn&#8217;t support const array or slice. It is because in go constant value is computed at compile time. Arrays or slices are always evaluated at run time. So below program would raise a compilation error<\/p>\n\n\n\n<h1 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Example\"><\/span><strong>Example<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h1>\n\n\n\n<pre class=\"wp-block-prismatic-blocks\"><code class=\"language-go\">package main\nfunc main() {\n\tconst e = [1]int{1}\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\">const initializer [1]int literal is not a constant<\/code><\/pre>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Table of Contents OverviewExample Overview Go only supports four types of constant Numeric ( int, int64, float, float64, complex128 etc) String Character or rune Boolean Go doesn&#8217;t support const array or slice&#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-4136","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 - 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