public class TrianglePattern {

public static void main(String[] args) {

int r = 4;

int c = 0;

triangle(r, c);

}

static void triangle(int r, int c) {

if (r == 0) {

return;

}

if (r > c) {

System.out.print("*");

triangle(r, c+1);

}

else {

System.out.println();

triangle(r-1, 0);

}

}

}