# False Constant

Use False in Calcul.io. See what this built-in constant represents, enter it in an editable calculation, and review related values and units.

## false

Try it yourself:

```calculio
false
```

[true](https://calcul.io/constants/true/index.md)

---

## false: Boolean False

**false** is the logical value representing an unmet condition. It is used in comparisons, filters, and conditional expressions.

## Software semantics

Use [and()](https://calcul.io/function/and/index.md), [or()](https://calcul.io/function/or/index.md), and [not()](https://calcul.io/function/not/index.md) to combine or reverse boolean values. Do not confuse false with numeric zero or an empty text value unless a rule explicitly converts them.

[All constants](https://calcul.io/constants/index.md)