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How to Replace All Occurrences of a Substring in a String in Go

How to Replace All Occurrences of a Substring in a String in Go ?

Answer

To replace all occurrences of a substring in a string in Go, you can use the strings.ReplaceAll function.


✐ Examples

1 Replacing Substring "Hello" with "Hi"

In this example,

  1. We create a string named str.
  2. We call the strings.ReplaceAll function with the substring to be replaced, the replacement string, and the input string as arguments.
  3. The strings.ReplaceAll function returns a new string with all occurrences of the substring replaced.
  4. Finally, we print the modified string.

Go Program

package main

import (
	"fmt"
	"strings"
)

func main() {
	str := "Hello World Hello"
	newStr := strings.ReplaceAll(str, "Hello", "Hi")
	fmt.Println(newStr)
}

Output

Hi World Hi

2 Replacing Character 'o' with 'X'

In this example,

  1. We create a string named str.
  2. We call the strings.ReplaceAll function with the character to be replaced, the replacement character, and the input string as arguments.
  3. The strings.ReplaceAll function returns a new string with all occurrences of the character replaced.
  4. Finally, we print the modified string.

Go Program

package main

import (
	"fmt"
	"strings"
)

func main() {
	str := "Hello World Hello"
	newStr := strings.ReplaceAll(str, "o", "X")
	fmt.Println(newStr)
}

Output

HellX WXrld HellX

Summary

In this tutorial, we learned How to Replace All Occurrences of a Substring in a String in Go language with well detailed examples.


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