541 : 반복제어문2 - 자가진단1

Java

import java.util.Scanner;
 
public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        char ch = sc.nextLine().charAt(0);
 
        for (int i=0; i<20; i++){
            System.out.print(ch);
        }
    }
}