How to Shuffle an Array in Go - Step by Step Examples

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How to Shuffle an Array in Go ?

Answer

In Go, you can shuffle an array using the Fisher-Yates shuffle algorithm.

✐ Examples

1 Shuffle Array of Integers

In this example,

We have an array named intArray containing integers.
We apply the Fisher-Yates shuffle algorithm to intArray.
We print the shuffled array to demonstrate the shuffling.

Go Program

package main
import (
	"fmt"
	"math/rand"
	"time"
)
func shuffleArray(array []int) {
	rand.Seed(time.Now().UnixNano())
	for i := len(array) - 1; i > 0; i-- {
		j := rand.Intn(i + 1)
		array[i], array[j] = array[j], array[i]
	}
}
func main() {
	intArray := []int{1, 2, 3, 4, 5}
	shuffleArray(intArray)
	fmt.Println("Shuffled Array:", intArray)
}

Output

Shuffled Array: [3 1 4 5 2]

2 Shuffle Array of Strings

In this example,

We have an array named strArray containing strings.
We apply the Fisher-Yates shuffle algorithm to strArray.
We print the shuffled array to demonstrate the shuffling.

Go Program

package main
import (
	"fmt"
	"math/rand"
	"time"
)
func shuffleArray(array []string) {
	rand.Seed(time.Now().UnixNano())
	for i := len(array) - 1; i > 0; i-- {
		j := rand.Intn(i + 1)
		array[i], array[j] = array[j], array[i]
	}
}
func main() {
	strArray := []string{"apple", "banana", "cherry"}
	shuffleArray(strArray)
	fmt.Println("Shuffled Array:", strArray)
}

Output

Shuffled Array: [banana cherry apple]

Summary

In this tutorial, we learned How to Shuffle an Array in Go language with well detailed examples.

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