Pascal's Triangle:

Program to print Pascal's triangle:

import java.io.*;
public class Pascal{

     public static void main(String []args)throws IOException{

       InputStreamReader isr=new InputStreamReader(System.in);
       BufferedReader br=new BufferedReader(isr);
       System.out.println("Enter the no. of rows");
       int n=Integer.parseInt(br.readLine());

       int a[][]=new int[50][50];
       
       int i=0,j=0,sp=n-1;
       
       for(i=0;i<n;i++)
       {
           a[i][i]=a[i][0]=1; // to assign value 1 to the diagonals
       }
       for(i=0;i<n;i++)
       {
           for(j=1;j<i;j++)
           {
               a[i][j]=a[i-1][j-1]+a[i-1][j];
           }
       }
       for(i=0;i<n;i++)
       {
           for(j=0;j<sp;j++) // loop for printing the spaces
           {
               System.out.print(" ");
           }
           for(j=0;j<=i;j++)
           {
               System.out.print(a[i][j]+" ");
           }
           System.out.println();
           sp--;
       }
       
       
     }
}

This way we can print the pascal's triangle using 2D array correctly because it is often confused by multiple of 11 which is not a correct method and it will not support after 5 rows.