---
title: Closest numeric match
type: snippet
language: javascript
tags: [math]
author: chalarangelo
cover: green-cabin-cow
dateModified: 2022-03-30T05:00:00-04:00
---

Finds the closest number from an array.

- Use `Array.prototype.reduce()` to scan all elements of the array.
- Use `Math.abs()` to compare each element's distance from the target value, storing the closest match.

```js
const closest = (arr, n) =>
  arr.reduce((acc, num) => (Math.abs(num - n) < Math.abs(acc - n) ? num : acc));
```

```js
closest([6, 1, 3, 7, 9], 5); // 6
```