# Subtract numbers

Subtract each number from the first in turn.

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

## Implementation

```javascript
function subtract(values) { return values.reduce((a, b) => a - b); }
```

## Input

```json
[
  10,
  3,
  2
]
```

## Expected output

```json
5
```

## Edge case

Input:
```json
[
  0.3,
  0.1
]
```
Output:
```json
0.19999999999999998
```

## Limits

- Binary floating-point: 0.3 − 0.1 is not exactly 0.2, as the edge case shows.

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/subtract-arguments.mdx
Author: Nguyen Huu Phuoc and original contributors
Contributors: See original repository history
Source commit: 14b481cf60dff1620ab1bb99a43b1f68068cdd9b
Copyright (c) 2020 phuoc-ng
License: MIT — https://1loc.dev/licenses/
Maintainer: Oveyon
Modifications: Takes one array instead of rest arguments. Original MDX retained as inert source evidence.