Arrays & Slices in Go
From the Go cheat sheet · Data Types & Structures · verified Jul 2026
Arrays & Slices
Working with arrays and slices
go
// Arrays (fixed size)
var arr [5]int
arr[0] = 10
// Slices (dynamic)
slice := []int{1, 2, 3}
slice = append(slice, 4)
// Make slice
s := make([]int, 5, 10) // len=5, cap=10📊 Arrays have fixed size, slices are dynamic
🔄 append() to add elements to slices
📦 make() to create slices with capacity
⚡ Slices are references to underlying arrays