Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
How to Replace characters in a Golang string?
The strings package of Golang has a Replace() function which we can use to replace some characters in a string with a new value. It replaces only a specified "n" occurrences of the substring.
In addition to Replace(), there is a ReplaceAll() function that replaces all the occurrences of a given substring with a new value.
Syntax
func Replace(s, old, new string, n int) string
Where,
s is the given string
old is the string which we want to replace
new is the string which will replace the old string
n represents the number of characters which we want to replace in the given string.
Example
The following example demonstrates how you can use the Replace() function to replace a substring with a new string.
package main
import (
"fmt"
"strings"
)
func main() {
// Initializing the Strings
s := "Go Programming Language"
old := "Go"
newstring := "Golang"
n := 1
// Display the Strings
fmt.Println("Original String: ", s)
// Using the Replace Function
testresult := strings.Replace(s, old, newstring, n)
// Display the Replace Output
fmt.Println("Replace Go with Golang:", testresult)
}Output
It will generate the following output −
Original String: Go Programming Language Replace Go with Golang: Golang Programming Language
Example
In this example, we are going to see how to replace a single character with a new value at a particular defined postion or index.
package main
import (
"fmt"
"strings"
)
func main() {
// Initializing the Strings
x := "Replace String Function"
y := "Go Language"
// Display the Strings
fmt.Println("1st String:", x)
fmt.Println("2nd String:", y)
// Using the Replace Function
test1 := strings.Replace(x, "i", "I", 2)
test2 := strings.Replace(y, "g", "G", -1)
// Display the Replace Output
fmt.Println("\n Replace 'i' with 'I' in the 1st String: \n", test1)
fmt.Println("\n Replace 'g' with 'G' in the 2nd String: \n", test2)
}Output
It will generate the following output −
1st String: Replace String Function 2nd String: Go Language Replace 'i' with 'I' in the 1st String: Replace StrIng FunctIon Replace 'g' with 'G' in the 2nd String: Go LanGuaGe
4K+ Views
