Slices

Context

A slice is a dynamically‑sized, flexible view into an array. Unlike arrays, slices are reference types and are used much more often. They consist of a pointer, length, and capacity.

Example

Create slices using literals, make, and slicing.

Code example

package main

import "fmt"

func main() {
    s1 := []int{1, 2, 3}          // slice literal
    s2 := make([]int, 3, 5)       // length 3, capacity 5
    s3 := s1[1:3]                 // slice from index 1 to 2

    s2[0] = 10
    s1 = append(s1, 4, 5)         // grows dynamically

    fmt.Println(s1, len(s1), cap(s1))
    fmt.Println(s2, len(s2), cap(s2))
    fmt.Println(s3)
}

Output

[1 2 3 4 5] 5 8
[10 0 0] 3 5
[2 3]

Useful links

• Go blog: Slices
• Go by Example: Slices