---
meta:
  title: Assignment subtraction operator
  description: This operator takes a variable and in a concise way, assigns another value to it while subtracting the original value to the new value.
---

This operator takes a variable and in a concise way, assigns another
value to it while subtracting the original value to the new value.

```javascript
let a = 1;
a -= 4; // a now equals -3
```
