JavaScript - Delete Character at a Given Position in a String

JavaScript - Insert Character at a Given Position in a String

Last Updated : 21 Nov, 2024

These are the following approaches to insert a character at a given position:

1. Using String Concatenation with Slicing

Split the string into two parts—before and after the position—and concatenate the character in between.

JavaScript

let str = "Hello GFG";
let ch = "!";
let idx = 5;

let res = str.slice(0, idx) + ch + str.slice(idx);
console.log(res);

Output

Hello! GFG

2. Using Template Literals

Using template literals, we can easily insert a character at a specified position in a string by breaking the string into two parts and injecting the new character between them.

JavaScript

let str = "Hello GFG";
let ch = "!";
let idx = 5;

let res = `${str.slice(0, idx)}${ch}${str.slice(idx)}`;
console.log(res);

Output

Hello! GFG

3. Using Arrays for Insertion

Convert the string into an array, insert the character at the desired position using array manipulation, and then join the array back into a string.

JavaScript

let str = "Hello GFG";
let ch = "!";
let idx = 5;

let arr = str.split(""); 
arr.splice(idx, 0, ch); 
let res = arr.join(""); 
console.log(res);

Output

Hello! GFG

JavaScript - Delete Character at a Given Position in a String

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