//*************************************************************************
//
// NumberTriangle accepts an integer number as input from the user, and then
// generates a triangle of numbers as output. The triangle comprises rows of 
// sequential numbers up to and including the number entered by the user.
// Kelli Wiseth
// 9-July-2004
// Platform: 	Wintel [Windows 2000]
// JDK version:	JDK 1.4.1
// 
//*************************************************************************

import java.io.*;

class NumberTriangle {
       
    public static void main (String args[]) throws IOException
    {
    BufferedReader stdin = new BufferedReader(new InputStreamReader(System.in));
    String num1;
    int rows=0;
    int columns=0;
    int total_rows=0;

    do
    {
    System.out.print("Please enter the size of the triangle:   ");
    System.out.flush();
    num1=stdin.readLine();
    total_rows=Integer.parseInt(num1);
    
    if (total_rows <= 0)
      
    System.out.println("Sorry. I can't create an empty triangle. " + 
        " \nPlease enter a whole number greater than 0.  ");
               
    }
    while (total_rows <= 0);

    for (rows = 1; rows <= total_rows; rows++)
        {
            for (columns=1; columns <= rows; columns++)
            System.out.print (rows);
            System.out.println();
        }

    }//main method

}//NumberTriangle class