freeCodeCamp/guide/chinese/certifications/javascript-algorithms-and-d.../basic-javascript/subtract-one-number-from-an.../index.md

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---
title: Subtract One Number from Another with JavaScript
localeTitle: 使用JavaScript从另一个数字中减去一个数字
---
## 使用JavaScript从另一个数字中减去一个数字
使用' - '减法运算符,您可以得到两个数字的差异......
```
var diff1 = 30 - 14; // Difference is 16
var diff2 = 90 - 60; // Difference is 30
```