isupper - Test for uppercase letter

Definition	#include <ctype.h> int isupper(int c); isupper checks whether the character c is an uppercase letter (A-Z).
Return val.	!= 0 0	c is an uppercase letter. c is not an uppercase letter.
Note	isupper is implemented both as a macro and as a function (see section “Functions and macros”).
Example	#include <ctype.h> #include <stdio.h> int main(void) { int c; while((c = getchar()) != EOF) printf("%s : %c\n",((isupper(c))? "Uppercase letter " : "Other"), c); return 0; }
See also	isalnum, isascii, iscntrl, isdigit, islower, isprint, ispunct, isgraph, isspace, isalpha, isxdigit, isebcdic, iswupper