Introduction

C program to check uppercase or lowercase alphabets. I have used DEV-C++ compiler for debugging purpose. But you can use any C programming language compiler as per your availability.

#include <stdio.h> 
int main()
{
    char ch;
 
    printf("Enter any character: ");
    scanf("%c", &ch);
    
 	if(ch >= 'a' && ch <= 'z')
    {
        printf("%c is lowercase alphabet.", ch);
    } 
    else if(ch >= 'A' && ch <= 'Z')
    {
        printf("%c is uppercase alphabet.", ch);
    }    
    else
    {
        printf("%c is not an alphabet.", ch);
    }
 
    return 0;
}

Result