Java Pascal Triangle

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I have given here Java code to build a pascal triangle. It uses simple nested for loops and Console.WriteLine functions. The input would be the number of rows in the pascal triangle.

 

 

Source Code

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import java.lang.*;

import java.util.*;

import java.io.*;

 

 

class PascalTriangle

{

 

   public static int ReadInteger()

   {

        try

        {

              InputStreamReader input = new InputStreamReader(System.in);

              BufferedReader reader = new BufferedReader(input);

              return Integer.parseInt(reader.readLine());

        }

        catch (Exception e)

        {

 

              e.printStackTrace();

              return 0;

        }

   }

  

 

 

   public static void main(String[] args)

   {    

      System.out.println("Pascal Triangle Program");

      System.out.print("Enter the number of rows: ");

      int n = ReadInteger();

     

      for (int y = 0; y < n; y++)

      {

         int c = 1;

         for (int q = 0; q < n - y; q++)

         {

            System.out.print("   ");

         }

 

         for (int x = 0; x <= y; x++)

         {

            System.out.format("   %3d ", c);

            c = c * (y - x) / (x + 1);

         }

         System.out.println();

         System.out.println();

      }

      System.out.println();

   }

}

Output

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