public class TriangleUtilities {

    public static String getRow(int numberOfStars) {
        String row = "";
        
        for(int i=0; i<numberOfStars; i++) {
            row = row + "*"; //row+="*"
        }
        return row;
    }
    
    public static String getTriangle(int numberOfRows) {
        String triangle = "";
        
        for (int i=0; i<numberOfRows; i++) {
            if (numberOfRows == 1) { // special case
                return "*";
            }
            
            triangle = triangle + getRow(i+1);
            triangle = triangle + "\n";
        }
        return triangle;
    }


    public static String getSmallTriangle() {
        return getTriangle(4);
    }

    public static String getLargeTriangle() {
        return getTriangle(9);
    }
}