docs-v2/content/v2.0/reference/flux/stdlib/math/mmax.md

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---
title: math.mMax() function
description: The math.mMax() function returns the larger of `x` or `y`.
aliases:
- /v2.0/reference/flux/functions/math/m_max/
- /v2.0/reference/flux/stdlib/math/m_max/
menu:
v2_0_ref:
name: math.mMax
parent: Math
weight: 301
---
The `math.mMax()` function returns the larger of `x` or `y`.
_**Output data type:** Float_
```js
import "math"
math.mMax(x: 1.23, y: 4.56)
// Returns 4.56
```
## Parameters
### x
The X value used in the operation.
_**Data type:** Float_
### y
The Y value used in the operation.
_**Data type:** Float_
## Special cases
```js
math.mMax(x:x, y:+Inf) // Returns +Inf
math.mMax(x: +Inf, y:y) // Returns +Inf
math.mMax(x:x, y: NaN) // Returns NaN
math.mMax(x: NaN, y:y) // Returns NaN
math.mMax(x: +0, y: ±0) // Returns +0
math.mMax(x: ±0, y: +0) // Returns +0
math.mMax(x: -0, y: -0) // Returns -0
```