by Sai gowtham

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.

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