HP 3000 Manuals

HP C/iX Library Reference Manual

isupper 

Tests whether an argument is an uppercase letter.

Syntax 

     #include <ctype.h>
     int isupper (int c);

Parameters 

c             An argument to be evaluated.  The argument must be
              representable as an unsigned char or the macro EOF.

Return Values 

!=0           The argument passed in c is an uppercase letter.

0             The argument passed in c is not an uppercase letter.

Description 

The isupper function returns a nonzero value if the argument passed in c 
is an uppercase letter (ASCII characters A through Z); otherwise, the
returned value is zero.

See Also 

isalnum, isalpha, iscntrl, isdigit, isgraph, islower, isprint, ispunct,
isspace, isxdigit.  ANSI C 4.3.1.10, POSIX.1 8.1

MPE/iX 5.0 Documentation