To insert a character at a specific index in a string in JavaScript, you can use string concatenation or the `splice()` method.
In this example,
str
with a value of "Hello World"
.'!'
at index 5
.str
.let str = 'Hello World';
str = str.slice(0, 5) + '!' + str.slice(5);
console.log(str);
Hello! World
In this tutorial, we learned How to Insert Character at Specific Index in String in JavaScript language with well detailed examples.