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toupper() -- ctype Function (libc)

Convert characters to upper case
#include <ctype.h>
int toupper(c) int c;

toupper() converts  the letter  c to upper  case and returns  the converted
character.  If c is not an lower-case character, that is, any character for
which islower() returns true, toupper() returns it unchanged.

Example

For an example of this routine, see the entry for tolower().

See Also

_toupper(),
libc,
tolower()
ANSI Standard, §7.3.2.2
POSIX Standard, §8.1