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C

A low-level systems language that powers operating systems, embedded devices and performance-critical code.

programming language

Quick facts

NameC

Typeprogramming language

Extensions.c .cats .h .h.in .idc

MIME type—

What is C

A low-level systems language that powers operating systems, embedded devices and performance-critical code.

GitHub Linguist classifies C as a programming language, typically using extensions such as .c, .cats, .h, .h.in, .idc.

File extensions:

.c.cats.h.h.in.idc

Related extensions

Related languages

Frequently asked questions

A low-level systems language that powers operating systems, embedded devices and performance-critical code.

Common extensions include .c, .cats, .h, .h.in, .idc.

Sources & standards

Updated 2026-08-18

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