Go arrays <TITLE><TITLE> slices

Home Go arrays <TITLE> slices</nav><button type="button" id="sidebar-trigger" class="btn btn-link" aria-label="Sidebar"> </button><div id="topbar-title"> Post</div><button type="button" id="search-trigger" class="btn btn-link" aria-label="Search"> </button> <search id="search" class="align-items-center ms-3 ms-lg-0"> <input class="form-control" id="search-input" type="search" aria-label="search" autocomplete="off" placeholder="Search..." > </search> <button type="button" class="btn btn-link text-decoration-none" id="search-cancel">Cancel</button></div></header><div class="row flex-grow-1"><main aria-label="Main Content" class="col-12 col-lg-11 col-xl-9 px-md-4"><article class="px-1" data-toc="false"><header><h1 data-toc-skip>Go arrays <TITLE><TITLE> slices</h1>Go arrays <TITLE><TITLE> slices<div class="post-meta text-muted"> Posted <time data-ts="1641475411" data-df="ll" data-bs-toggle="tooltip" data-bs-placement="bottom" > Jan 6, 2022 </time> Updated <time data-ts="1760984366" data-df="ll" data-bs-toggle="tooltip" data-bs-placement="bottom" > Oct 20, 2025 </time> <div class="mt-3 mb-3"> <a href="/assets/images/blog/go-1.jpg" class="popup img-link preview-img shimmer"><img src="/assets/images/blog/go-1.jpg" alt="Preview Image" width="1200" height="630" loading="lazy"></a></div><div class="d-flex justify-content-between"> By <div> 1 min read</div></div></div></header><div class="content"><div class="language-go highlighter-rouge"><div class="code-header"> <button aria-label="copy" data-title-succeed="Copied!"></button></div><div class="highlight"><code><table class="rouge-table"><tbody><tr><td class="rouge-gutter gl"><pre class="lineno">1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 </pre><td class="rouge-code"><pre>package main import ( "fmt" // "strconv" // "math" ) func arrays() { grade1 := 97 grade2 := 85 grade3 := 93 grades := [3]int{11,22,33} // [...]int{if I do not know how many elements will be stored in array} gradesx := [...]int{11,22,33,444} fmt.Printf("Grades: %v, %v, %v\n", grade1, grade2, grade3) fmt.Printf("%v\n", grades) fmt.Printf("%v\n", gradesx) var students [3]string fmt.Printf("Printing an empty array %v\n", students) students[0] = "jano" fmt.Printf("Printing filled array %v\n", students) } func slices() { a := []int{1,4,7} fmt.Printf("Printing slice %v\n", a) fmt.Printf("Printing slice length: %v\n", len(a)) fmt.Printf("Printing slice capacity %v\n", cap(a)) x := []int{1,2,3,4,5,6,7,8,9,10} b := x[:] c := x[3:] d := x[:6] e := x[3:6] // changes same underlying data () x[5] = 42 fmt.Printf("%v\n", x) fmt.Printf("%v\n", b) fmt.Printf("%v\n", c) fmt.Printf("%v\n", d) fmt.Printf("%v\n", e) // special make() function v := make([]int, 3, 100) fmt.Printf("Printing slice %v\n", v) fmt.Printf("Printing slice length: %v\n", len(v)) fmt.Printf("Printing slice capacity %v\n", cap(v)) j := []int{} j = append(j, 10) j = append(j, 20) fmt.Printf("Printing slice %v\n", j) fmt.Printf("Printing slice length: %v\n", len(j)) fmt.Printf("Printing slice capacity %v\n", cap(j)) t := []int{} t = append(t, 88) t = append(t, 77, 99) // t = append(t, []int{11, 22, 55}...) fmt.Printf("Printing slice %v\n", t) fmt.Printf("Printing slice length: %v\n", len(t)) fmt.Printf("Printing slice capacity %v\n", cap(t)) } func main() { // arrays() slices() } </pre></table></code></div></div></div><div class="post-tail-wrapper text-muted"><div class="post-meta mb-3"> <a href="/categories/tiddlywiki/">tiddlywiki</a></div><div class="post-tags"> <a href="/tags/go/" class="post-tag no-text-decoration" >go</a> <a href="/tags/arrays/" class="post-tag no-text-decoration" >arrays</a> <a href="/tags/slices/" class="post-tag no-text-decoration" >slices</a></div><div class=" post-tail-bottom d-flex justify-content-between align-items-center mt-5 pb-2 " 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