golang replace string

package main

import (
    "fmt"
    "strings"
)

func main() {
    // Sample string
    inputString := "Hello, world! Hello, Golang!"

    // String to be replaced
    oldSubstring := "Hello"

    // Replacement string
    newSubstring := "Hi"

    // Perform string replacement
    outputString := strings.Replace(inputString, oldSubstring, newSubstring, -1)

    // Print the result
    fmt.Println(outputString)
}