C Language and Libraries Help (clang.hlp) (Table of Contents; Topic list)
Character-Classification Functions
                                             ◄Up► ◄Contents► ◄Index► ◄Back►
─────Run-Time Library───────────────────────────────────────────────────────
 
   The following functions identify the type of a character or convert
   between types:
 
   isalnum     iscntrl      ispunct       tolower
   isalpha     isdigit      isspace      _tolower
 __isascii     isgraph      isupper       toupper
  _iscsym      islower      isxdigit     _toupper
  _iscsymf     isprint    __toascii
                                    -♦-