reverse string in javascript

Understanding how to manipulate strings is crucial in any programming language, including JavaScript. This article will guide you through how to reverse a string in JavaScript.

Code snippet for reversing a string

Here is an efficient and simple way to reverse a string with JavaScript:

function reverseString(str) {
    return str.split('').reverse().join('');
}
console.log(reverseString("Hello World"));

Code Explanation for reversing a string

Let’s break down each step of the function:

1. .split(''): This method is used to split a string into an array of substrings. In this case, it splits the string into individual letters.

   • Example: "Hello".split('') will return ['H', 'e', 'l', 'l', 'o'].

2. .reverse(): This method is used on arrays to reverse their order.

   • Example: ['H', 'e', 'l', 'l', 'o'].reverse() will return ['o', 'l', 'l', 'e', 'H'].

3. .join(''): This method is used to rejoin the elements in the array back into a single string.

   • Example: ['o', 'l', 'l', 'e', 'H'].join('') will return 'olleH'.

In the function reverseString(str), these three methods are chained together to succinctly reverse the input string. The final line, console.log(reverseString("Hello World"));, calls our function with the string “Hello World” and logs the output, which will be “dlroW olleH”, to the console.