字母判断

package second;

import java.util.Scanner;

public class 字母限制 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        int l = 0;

        System.out.println("请输入:");
        String s = sc.next();
        char[] c = s.toCharArray();//吧字符串转换为字符组

        for(int i=0;i<c .length;i++){
            if(‘a‘<=c[i] && ‘z‘>=c [i]){
                l++;
            }
        }
        System.out.println("字符串:"+s+" 中有"+l+"个小写字母");

    }
}