C keywords: register

 

C

Language

headers

Type support

Dynamic memory management

Error handling

Program utilities

Variadic function support

Date and time utilities

Strings library

Algorithms

Numerics

Input/output support

Localization support

Thread support (C11)

Atomic operations (C11)

Technical Specifications

 

C keywords

auto break case char const continue default do double else enum extern	float for goto if inline int long register restrict return short	signed sizeof static struct switch typedef union unsigned void volatile while	_Alignas _Alignof _Atomic _Bool _Complex _Generic _Imaginary _Noreturn _Static_assert _Thread_local
preprocessor-specific
_Pragma
conditionally-supported
fortran
asm

 

Usage

• automatic duration storage-class specifier with no linkage. Hints that the variable will be used heavily.