**`gmp_neg`** is a function in PHP that returns the negative of a GMP number.

The following illustration shows the visual representation of the `gmp_neg` function.




# 
## Syntax
```
gmp_neg(GMP|int|string $num): GMP
```

## Parameters
The function takes in one parameter: `num`.

>`num` can be a numeric `string`, #key# GMP: GNU Multiple Precision Arithmetic Library #key# object, or of the`int` type.

## Return value

The function returns the negative of a number. The value returned is a `GMP` type number.

## Code

<?php
$val1 = gmp_neg("22");
echo gmp_strval($val1) . "\n";
$val2 = gmp_neg("-12456");
echo gmp_strval($val2) . "\n";
?>

What is gmp_neg in PHP?

gmp_neg is a function in PHP that returns the negative of a GMP number. The following illustration shows the visual representation of the gmp_neg function. 

What is gmp_neg in PHP?

Syntax

Parameters

Return value

Code

Expected output