Syntax

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

Parameters

c

(IN) Specifies the character to be tested.

Return Values

isupper returns a nonzero value when the argument is an uppercase character. Otherwise, a value of 0 is returned.

Remarks

The isupper function or macro tests for any uppercase character (A to Z) in the ASCII code set.

See Also

isalnum, isalpha, iscntrl, isdigit, islower, isprint, ispunct, isspace, isxdigit, tolower, toupper