# calc-number

> js 在数字计算的时候，存在"浮点数精度丢失"问题。

Latest version **0.2.4** (published 2025-03-03) · ISC license · 0 weekly downloads

## Install

```sh
npm install calc-number
pnpm add calc-number
yarn add calc-number
bun add calc-number
```

## Health

**Score 35/100 (D)** — status: maintenance-mode.

Positive: has types; no vulnerabilities; high quality score.

Warnings: low downloads; no esm support; pre 1.0.

Negative: stale; low maintenance score.

## Facts

| | |
|---|---|
| Version | 0.2.4 |
| Published | 2025-03-03 |
| First published | 2023-11-29 |
| Weekly downloads | 0 |
| License | ISC |
| TypeScript types | bundled |
| Module format | CommonJS |
| Dependencies | 1 |
| Unpacked size | 29 KB |
| Known vulnerabilities | 0 |
| Install scripts | no |
| GitHub stars | 4 |
| Maintainers | wanghaoran5555 |

## Links

- npm: https://www.npmjs.com/package/calc-number
- Repository: https://github.com/13601313270/calc-number
- Homepage: https://github.com/13601313270/calc-number#readme
- Issues: https://github.com/13601313270/calc-number/issues
- npm.io page: https://npm.io/package/calc-number

## Dependencies (1)

- [bignumber.js](https://npm.io/package/bignumber.js.md) ^9.1.2

## Recent versions

- 0.2.4 (latest) — 2025-03-03
- 0.2.3 — 2024-10-21
- 0.2.2 — 2024-10-20
- 0.2.1 — 2024-10-19
- 0.2.0 — 2024-07-29
- 0.1.1 — 2024-04-22
- 0.1.0 — 2023-12-03
- 0.0.4 — 2023-11-29
- 0.0.3 — 2023-11-29
- 0.0.2 — 2023-11-29
- 0.0.1 — 2023-11-29

## README

# 解决js数字计算精度问题

js 在数字计算的时候，存在"浮点数精度丢失"问题。

比如：0.1+0.2 = 0.30000000000000004

在计算和金额计算等场景下，就会存在健壮问题。本npm包，通过最简单的一个api方式解决这个问题。

# 引入
```
npm i calc-number --save
```
# 使用
```javascript
import calcNumber from 'calc-number'

const result = calcNumber('0.1+0.2')
console.log(result);// 输出0.3
```

# 说明
```javascript
// 支持括号
calcNumber('(0.3+0.3)*3');// 1.8

// 连续运算会正确的计算优先级*/大于+-
calcNumber('1+2*3/2+2*4');// 12

// 支持**幂次方运算
calcNumber('3**2')// 9
```

运算优先级对齐js的数字计算


# 更多扩展能力
### 支持内置函数调用

sin,cos,tan,atan,

```javascript
calcNumber('sin(1)');
```


### 后置处理
#### 保留小数位 toFixed

```javascript
calcNumber('(23.123*3).toFixed(2)');
```

---
_Source: https://npm.io/package/calc-number · Machine-readable twin of the npm.io package page. Health data is recomputed on every publish._