---
title: sqrt
card_id: 65137
---

# sqrt

```
the sqrt of [ph:number]
```

Value returned: a number equal to the square root of `[ph:number]`.  If `[ph:number]` is negative, `sqrt` returns `NAN(001)`, which means “not a number.”

## Examples

```
the sqrt of 2
sqrt(2)

the sqrt of 9 + 16 -- returns 19
the sqrt of (9 + 16) -- returns 5
```

## Related Topics

* [divide](/HyperTalkReference/commands/divide)
* [multiply](/HyperTalkReference/commands/multiply)
* [numberFormat](/HyperTalkReference/properties/numberFormat)