별찍기, java

package 반복문관련;

import java.util.Scanner;

import java.io.IOException;

public class star {

public static void main(String[] args) {

Scanner input = new Scanner(System.in);

int height_ = 0;

int i, j; // index

height_ = input.nextInt();

for (i = 1; i <= height_; i++) {

for (j = 1; j<=i; j++) {

System.out.printf("%c", '*');

}

System.out.println();

}

}

}