C program to check whether given alphabet is in Upper case or lowercase.

#include<stdio.h>

#include<conio.h>

void main() {

char ch;

clrscr();

printf("Enter an alphabet\n");

scanf("%c",&ch);

if (ch>=65&&ch<=90) 

printf("%c is in Upper Case or Capital Letter\n",ch);

else {

if (ch>=97&&ch<=122) 

printf("%c is Lower Case or Small Letter\n",ch);

else 

printf("%c is not an alphabet\n",ch);

}

getch();

}