# cstddef File Reference

`#include <stddef.h>`

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## Namespaces

namespace | std

## Detailed Description

This is a Standard C++ Library file. You should `#include` this file in your programs, rather than any of the "*.h" implementation files.

This is the C++ version of the Standard C Library header `stddef.h`, and its contents are (mostly) the same as that header, but are all contained in the namespace `std`.

Definition in file cstddef.