public class TriangleUtilities {

    public static String getRow(int numberOfStars) {
        String result="";
        for(int i=1;i<= numberOfStars;i++)
        {
            result=result+ "*";
        }
        return result;
    }
    
    public static String getTriangle(int numberOfRows) {
         String result="";
        for(int line=1;line<=numberOfRows;line++)
           {
               for( int j =1 ; j<=line; j++ )
               {
                 result = result+"*" ;
                }
               result= result+ "\n"; 
           }
        return result;
       
    }


    public static String getSmallTriangle() {
        String result="";
        for(int line=1;line<=4;line++)
           {
               for( int j =1 ; j<=line; j++ )
               {
                 result = result+"*" ;
                }
               result= result+ "\n"; // \n to change line 
           }
        return result;
    }

    public static String getLargeTriangle() {
         String result="";
        for(int line=1;line<=9;line++)
           {
               for( int j =1 ; j<=line; j++ )
               {
                 result = result+"*" ;
                }
               result= result+ "\n"; 
           }
        return result;
    }
}