JavaScript - Add a Character to the End of a String

These are the following ways to insert a character at the end of the given string:

1. Using Concatenation

We can use the + operator or template literals to append the character.

let str = "Hello GFG";
let ch = "!";
let res = str + ch;
console.log(res); 

Hello GFG!

2. Using Template Literals

String concatenation using + or template literals is an effective way to insert a character at the end of a string. This method creates a new string with the desired modification without altering the original string (since strings are immutable in JavaScript).

let str = "Hello, World!";
let ch = "*";
let res = `${str}${ch}`;
console.log(res);

Hello, World!*

3. Using slice() Method

The slice method to extract the original string and append the new character.

let str = "Hello GFG";
let ch = "!";
// Slices the entire string and appends the character
let res = str.slice(0) + ch; 
console.log(res); 

Hello GFG!

4. Using Using splice() Method (Array-Based)

Convert the string to an array, use splice to insert the character, and join the array back into a string.

let str = "Hello GFG";
let ch = "!";
// Convert string to array
let arr = str.split(""); 
// Insert character at the end
arr.splice(arr.length, 0, ch); 
// Convert array back to string
let res = arr.join(""); 
console.log(res); 

Hello GFG!