How to swap two variables in JavaScript

In this tutorial, we are going to learn about how to swap the values of two variables using JavaScript.

Consider, we have a two variables like this:

let x = 10;

let y = 11;

Now, we need to swap the x variable value with y variable.

Using the destructuring assignment

To swap the two variables in JavaScript, we can use the es6 destructuring assignment syntax.

Here is an example:

let x = 10;

let y = 11;

[x, y] = [y, x];

console.log(x, y); // 11 , 10

Similarly, we can also swap it by creating a tmp (temporary) variable in JavaScript.

let x = 10;
let y = 11;

let tmp = x;
x = y;
y= tmp;

console.log(x, y); // 11 , 10

In the above code, we first initialized a tmp variable and assigned the x variable to it, then we updated the x variable with y and we assigned the tmp variable to y.