C18 (C standard revision)

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C18 (previously known as C17) is the informal name for ISO/IEC 9899:2018,[1] the most recent standard for the C programming language, published in June 2018. It replaced C11 (standard ISO/IEC 9899:2011).[2]

C18 will be superseded by C2x.[3]

Changes from C11[edit]

C18 addressed defects in C11 without introducing new language features.[2]

The __STDC_VERSION__ macro is increased to the value 201710L.

Compiler support[edit]

List of compilers supporting C18:

See also[edit]


  1. ^ "ISO/IEC 9899:2018 - Information technology -- Programming languages -- C". www.iso.org.
  2. ^ a b "The Standard - C". www.iso-9899.info.
  3. ^ "WG 14 Document log". www.open-std.org.
  4. ^ "Using the GNU Compiler Collection (GCC): C Dialect Options". gcc.gnu.org.
  5. ^ http://releases.llvm.org/7.0.0/tools/clang/docs/UsersManual.html#differences-between-various-standard-modes
  6. ^ "IAR Information Center for Arm - Release notes". netstorage.iar.com.

External links[edit]

Preceded by
C language standards Succeeded by