libc.info: Ctype

Go forward to Stdio
Go backward to Stdlib
Go up to Top
Go to the top op libc

Character Type Macros and Functions (`ctype.h')

This chapter groups macros (which are also available as subroutines) to
classify characters into several categories (alphabetic, numeric,
control characters, whitespace, and so on), or to perform simple
character mappings.
   The header file `ctype.h' defines the macros.