A Tour of Go Arrays

The type [n]T is an array of n values of type T.

The expression

var a [10]int

declares a variable a as an array of ten integers.

An array's length is part of its type, so arrays cannot be resized. This seems limiting, but don't worry; Go provides a convenient way of working with arrays.

package main 

import "fmt"

func main() {
    var a []string
    a[] = "Hello"
    a[] = "World"
    fmt.Println(a[], a[])
    fmt.Println(a)
}