---
title: math.floor
summary: null
url: >-
  https://www.fastly.com/documentation/reference/vcl/functions/math-rounding/math-floor
---

```
FLOAT math.floor(FLOAT x)
```

**Available in:** all subroutines

Computes the largest integer value less than or equal to the given value.
In other words, round `x` towards negative infinity.

For example, 2.2, 2.5, and 2.7 all floor to 2.0.

## Return Value

If `x` is `math.NAN`, a NaN will be returned.

If `x` is integral, ±0, `x` itself is returned.

If `x` is `math.POS_INFINITY` or
`math.NEG_INFINITY`, an infinity
of the same sign is returned.

Otherwise, the rounded value of `x` is returned.