Tour of Go 2.0

Slices

Slices are what you’ll actually use day-to-day. Unlike arrays, they’re dynamically sized — a flexible window into an underlying array.

The type []T is a slice of T values.

Create a slice with a low and high bound separated by a colon:

a[low : high]

This is a half-open range: it includes the element at low, but excludes high. So a[1:4] gives you elements at indices 1, 2, and 3.

Try it: Change the indices in primes[1:4] to see different subsets of the array.

main.go ▶ Run in Playground 
package main

import "fmt"

func main() {
	primes := [6]int{2, 3, 5, 7, 11, 13}

	var s []int = primes[1:4]
	fmt.Println(s)
}