Overview

math/rand package of GO provides a Perm method that can be used generate the pseudo-random slice of n integers. The array will be pseudo-random permutation of the integers in the range [0,n).

To know more about what pseudo-random number means, checkout this post – https://golangbyexample.com/generate-random-number-golang
Below is the signature of the function. It takes a number n as input and returns the permuted slice.

func Perm(n int) []int

Code:

package main

import (
    "fmt"
    "math/rand"
    "time"
)

func main() {
    //Provide seed
    rand.Seed(time.Now().Unix())

    //Generate a random array of length n
    fmt.Println(rand.Perm(10))
    fmt.Println(rand.Perm(10))
}

Output:

[6 0 1 5 9 4 2 3 7 8]
[9 8 5 0 3 4 6 7 2 1]