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TOUPPER(3)                  BSD Programmer's Manual                 TOUPPER(3)

NAME
     toupper - lower case to upper case letter conversion

SYNOPSIS
     #include <&lt;ctype.h>&gt;

     int
     toupper(int c);

DESCRIPTION
     The toupper() function converts a lower-case letter to the corresponding
     upper-case letter.  If the argument is a lower-case letter, the toupper()
     function returns the corresponding upper-case letter if there is one;
     otherwise the argument is returned unchanged.

SEE ALSO
     isascii(3),  isalnum(3),  isalpha(3),  iscntrl(3),  isdigit(3),
     isgraph(3),  islower(3),  isprint(3),  ispunct(3),  isspace(3),
     isupper(3),  isxdigit(3),  toascii(3),  toupper(3),  stdio(3) ascii(7)

STANDARDS
     The tolower() function conforms to ANSI C X3.159-1989 (``ANSI C '').

4.4BSD                           June 4, 1993                                1