List Of C Language Keywords

The following names are reserved by the C language. Their meaning is already defined, and they cannot be re-defined to mean anything else.

Other than these names, you can choose any names of reasonable length for variables, functions etc. The names must begin with a letter or underscore (letters are better), and then can contain letters, numbers and underscores.

  • auto

  • break

  • case

  • char

  • const

  • continue

  • default

  • do

  • double

  • else

  • enum

  • extern

  • float

  • for

  • goto

  • if

  • int

  • long

  • register

  • return

  • short

  • signed

  • sizeof

  • static

  • struct

  • switch

  • typedef

  • union

  • unsigned

  • void

  • volatile

  • while

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