Go - Slice Append Example

In this example, we will show you how to use built-in append function appends new elements to the slice in Go with an example.

Go slice append - The built-in append function appends new elements to the slice.

Go - slice append example

In the example, we append new elements to a slice, which already has two elements. 

package main

import "fmt"

func main() {

    vals := make([]int, 2)

    fmt.Printf("slice: %v; len: %d; cap: %d \n", vals, len(vals), cap(vals))

    fmt.Println("---------------------------")

    vals = append(vals, 10)
    vals = append(vals, 20)
    vals = append(vals, 30)
    vals = append(vals, 40, 50, 60)

    fmt.Printf("slice: %v; len: %d; cap: %d \n", vals, len(vals), cap(vals))
}

Output: 

slice: [0 0]; len: 2; cap: 2 
---------------------------
slice: [0 0 10 20 30 40 50 60]; len: 8; cap: 8

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