Java Program to Print Seirpinski Tringle Star Pattern

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Program to Print Seirpinski Tringle Star Pattern

In this article we are going to see how to print Seirpinski tringle star program.

Example-1

When row value=8

       *
      * *
     *   *
    * * * *
   *        *
  * *     * *
 *   *    *   *
* * * * * * * *
Example-2:

When row value=16

               *
              * *
             *   *
            * * * *
           *       *
          * *     * *
         *   *   *   *
        * * * * * * * *
       *                  *
      * *                * *
     *   *              *   *
    * * * *          * * * *
   *         *        *        *
  * *      * *      * *      * *
 *   *    *   *    *   *    *   *
* * * * * * * * * * * * * * * *

Now, let’s see the actual program to print it.

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Approach:

  • Enter total row and store it in an integer variable row.
  • Take first outer for loop to print the row value.
  • Take first inner for loop for printing space.
  • Take second for loop for printing space according to condition if ((c & y) != 0) else it will print star.
  • Then go on printing the star symbol according to loop.

JAVA Code:

import java.util.*;
public class Main 
{    
    public static void main(String args[])   
    {   
    // taking variable for loop iteration and row .
    int row,r,c,y;
    //creating scanner class object 
    Scanner s = new Scanner(System.in);
    // entering the number of row
    System.out.print("Enter rows : ");
    row = s.nextInt();
    //outer for loop 
    for (  y = row - 1; y >= 0; y--)
    {
            // printing space till the value of y 
            for (  r = 0; r < y; r++) 
                System.out.print(" ");
            // printing '*'
            for ( c = 0; c + y < row ; c++) 
            {
                if ((c & y) != 0)
                    System.out.print("  ");
                else
                    System.out.print("* ");
            }
             System.out.print("\n");
   }
  }
}

Output :

Enter row :  8

       *
      * *
     *   *
    * * * *
   *        *
  * *      * *
 *   *    *   *
* * * * * * * *

C Code:

#include <stdio.h>
int main() 
{
   int r, row, c,y ;
   printf("Enter rows: ");
   scanf("%d", &row);
    for (  y = row - 1; y >= 0; y--)
    {
            // printing space till the value of y 
            for (  r = 0; r < y; r++) 
                 printf(" ");
            // printing '*'
            for ( c = 0; c + y < row ; c++) 
            {
                if ((c & y) != 0)
                     printf("  " );
                else
                     printf("* ");
            }
              printf("\n");
   }
   return 0;
}


Output :

Enter row :  8

       *
      * *
     *   *
    * * * *
   *        *
  * *      * *
 *   *     *   *
* * * * * * * *

C++ Code:

#include <iostream>
using namespace std;
int main()
{
   int row, r , c, y ;
   cout << "Enter  rows: ";
   cin >> row;
    for (  y = row - 1; y >= 0; y--)
    {
            // printing space till the value of y 
            for (  r = 0; r < y; r++) 
                cout <<" ";
            // printing '*'
            for ( c = 0; c + y < row ; c++) 
            {
                if ((c & y) != 0)
cout << "  " ;
                else
                    cout <<"* ";
            }
             cout <<"\n";
   }
   return 0;
}

Output :

Enter row :  8

       *
      * *
     *   *
    * * * *
   *         *
  * *      * *
 *   *     *   *
* * * * * * * *

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