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Isabelle Viktoria Maciohsek
2020-10-20 23:02:01 +03:00
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snippets/isNegativeZero.md
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---
title: isNegativeZero
tags: math,beginner
tags: math,intermediate
---
Checks if the given value is equal to negative zero (`-0`).
- Checks whether a passed value is equal to `0` and if `1` divided by the value equals `-Infinity`.
- Check whether a passed value is equal to `0` and if `1` divided by the value equals `-Infinity`.
```js
const isNegativeZero = val => val === 0 && 1 / val === -Infinity;