# PR_Calloc

Allocates zeroed memory from the heap for a number of objects of a given
size.

## Syntax

```{code}
#include <prmem.h>

void *PR_Calloc (
   PRUint32 nelem,
   PRUint32 elsize);
```

### Parameters

`nelem`

: The number of elements of size `elsize` to be allocated.

`elsize`

: The size of an individual element.

### Returns

An untyped pointer to the allocated memory, or if the allocation attempt
fails, `NULL`. Call `PR_GetError()` to retrieve the error returned
by the libc function `malloc()`.

## Description

This function allocates memory on the heap for the specified number of
objects of the specified size. All bytes in the allocated memory are
cleared.