#include <stdio.h>

int main() {
	char a;

	printf("Enter a character: ");
	scanf("%c", &a);

	if ((a >= 'A' && a <= "Z") || (a >= "a" && a < 'z')) { // >=, <= comparison operator; && logical operator
		printf("The character is an alphabet.");
	} else if (a >= '0' && a <= '9') {
		printf("The character is a digit.");
	} else {
		printf("The character is neither an alphabet nor a digit.");
	}
}