C Program to Check Whether Character is Uppercase or Not without using Library function

Program : Check Whether Entered Character is Uppercase Letter or Not Without using Library Function.
Way 1 :

#include<stdio.h>

int main() {
   char ch;

   printf("\nEnter The Character : ");
   scanf("%c", &ch);

   if (ch >= 'A' && ch <= 'Z')
      printf("Character is Upper Case Letters");
   else
      printf("Character is Not Upper Case Letters");

   return (0);
}

#include<stdio.h>

int main() {

char ch;

printf("\nEnter The Character : ");

scanf("%c", &ch);

if (ch >= 'A' && ch <= 'Z')

printf("Character is Upper Case Letters");

else

printf("Character is Not Upper Case Letters");

return (0);

}

Way 2 :

#include<stdio.h>

int main() {
   char ch;

   printf("\nEnter The Character : ");
   scanf("%c", &ch);

   if (ch >= 65 && ch <= 90)
      printf("Character is Upper Case Letters");
   else
      printf("Character is Not Upper Case Letters");

   return (0);
}