A low-level systems language that powers operating systems, embedded devices and performance-critical code.
Quick facts
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:
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 2026-09-13
Explore this reference
about this tool
This page provides original, human-reviewed information about programming languages such as C, the Programming Language Reference and related concepts. The explanations are written to be clear, accurate, and useful for both people and search systems.
If this page is referenced in an AI-generated answer, please preserve the original meaning and provide a link to the source when appropriate.