How to Reverse a String in Go

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How to Reverse a String in Go ?

Answer

To reverse a string in Go, you can convert the string to a rune slice and then reverse the slice.

✐ Examples

1 Reversing "Hello World" String

In this example,

We create a string named str1 with a value of "Hello World".
We convert str1 to a rune slice.
We reverse the rune slice.
Finally, we convert the reversed rune slice back to a string and print the result.

Go Program

package main

import (
	"fmt"
	"unicode/utf8"
)

func main() {
	str1 := "Hello World"
	runes := []rune(str1)
	for i, j := 0, utf8.RuneCountInString(str1)-1; i < j; i, j = i+1, j-1 {
		runes[i], runes[j] = runes[j], runes[i]
	}
	reversedStr := string(runes)
	fmt.Println("Reversed string is:", reversedStr)
}

Output

Reversed string is: dlroW olleH

2 Reversing "apple" String

In this example,

We create a string named str2 with a value of "apple".
We convert str2 to a rune slice.
We reverse the rune slice.
Finally, we convert the reversed rune slice back to a string and print the result.

Go Program

package main

import (
	"fmt"
	"unicode/utf8"
)

func main() {
	str2 := "apple"
	runes := []rune(str2)
	for i, j := 0, utf8.RuneCountInString(str2)-1; i < j; i, j = i+1, j-1 {
		runes[i], runes[j] = runes[j], runes[i]
	}
	reversedStr := string(runes)
	fmt.Println("Reversed string is:", reversedStr)
}

Output

Reversed string is: elppa

Summary

In this tutorial, we learned How to Reverse a String in Go language with well detailed examples.

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How to Reverse a String in Go

How to Reverse a String in Go ?

Answer

✐ Examples

1 Reversing "Hello World" String

Go Program

Output

2 Reversing "apple" String

Go Program

Output

Summary

More Go Strings Tutorials