题解 | #判断是不是字母#

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        while (scanner.hasNext()) {
            char c = scanner.next().charAt(0);

            if ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')) {
                System.out.println(c + " is an alphabet.");
            } else {
                System.out.println(c + " is not an alphabet.");
            }
        }
    }
}