freeCodeCamp/guide/english/certifications/javascript-algorithms-and-data-structures/basic-javascript/decrement-a-number-with-javascript/index.md

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title: Decrement a Number with JavaScript
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# Decrement a Number with JavaScript


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## Hints

### Hint 1
Decrement a number using the '--' operator:

```javascript
var a = 5;
a--; // Now, 'a' is 4
--a; // Now, 'a' is 3
```