---
title: isOdd
tags: math,beginner
---

Checks if the given number is odd.

- Check whether a number is odd or even using the modulo (`%`) operator.
- Return `true` if the number is odd, `false` if the number is even.

```js
const isOdd = num => num % 2 === 1;
```

```js
isOdd(3); // true
```