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snippets/articles/s/javascript-swap-two-variables.md

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+---
+title: "Tip: How to swap two variables in JavaScript"
+shortTitle: Swap two variables
+type: tip
+language: javascript
+tags: [variables]
+author: chalarangelo
+cover: mountain-lake-2
+excerpt: Learn how to swap the values of two variables in JavaScript using a single line of ES6 code.
+dateModified: 2021-06-12T19:30:41+03:00
+---
+
+In the past, swapping the values of two variables in JavaScript required an intermediate variable to store one of the values while swapping, which would result in something similar to this:
+
+```js
+let a = 10;
+let b = 20;
+
+let tmp;
+tmp = a;
+a = b;
+b = tmp;
+```
+
+While this approach still works, there are more elegant and less verbose options available to us nowadays. For example, JavaScript ES6 introduced **destructuring assignments**, allowing individual array items to be assigned to variables in a single statement. Here's what that looks like:
+
+```js
+const [x, y] = [1, 2];
+```
+
+Destructuring assignments are extremely useful in a handful of situations, including swapping two variables. To accomplish this, we can create an array from the two variables, then use a destructuring assignment to reassign them to each other:
+
+```js
+let a = 10;
+let b = 20;
+
+[a , b] = [b, a];
+```