题解 | #判断是不是字母#

import java.util.Scanner;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        while(in.hasNext()){
          char c =in.next().charAt(0);
          if(c>='A'&&c<='z'){
            System.out.println(c+" is an alphabet.");
          }else{
            System.out.println(c+" is not an alphabet.");
          }
        }
    }
}