# Clamp a number to a range

Keep a number inside an inclusive minimum and maximum.

Canonical: https://1loc.dev/number/clamp-a-number-between-two-values/
Version: 1.0.0
Runtime: JavaScript · Node.js 22 / modern browsers
Verification: Local fixtures; no external services
Updated: 2026-10-28

## Implementation

```javascript
function clamp({ value, min, max }) { return Math.min(max, Math.max(min, value)); }
```

## Input

```json
{
  "value": 120,
  "min": 0,
  "max": 100
}
```

## Expected output

```json
100
```

## Edge case

Input:
```json
{
  "value": -5,
  "min": 0,
  "max": 100
}
```
Output:
```json
0
```

## Limits

- All values must be finite numbers and min must not exceed max.
- Clamping is a product decision; reject invalid input instead when hiding it would be unsafe.

The lab validates types and size before calling this function. Add equivalent validation at your own trust boundary.

## Source and license

Original: https://github.com/phuocng/1loc/blob/14b481cf60dff1620ab1bb99a43b1f68068cdd9b/contents/clamp-a-number-between-two-values.mdx
Author: Nguyen Huu Phuoc and original contributors
Contributors: r-i-c-h
Source commit: 14b481cf60dff1620ab1bb99a43b1f68068cdd9b
Copyright (c) 2020 phuoc-ng
License: MIT — https://1loc.dev/licenses/
Maintainer: Oveyon
Modifications: Curated implementation; explicit input bounds, edge cases, local fixtures and rebuilt presentation. Original MDX retained as inert source evidence.