Java Program to Print Double Sided Stair Case Star Pattern

Program to Print Double Sided Stair Case Star Pattern

In this article we are going to see how to print double sided staircase star program.

Example-1

When row value=8

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

Example-2:

When row value=10

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

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

Approach:

Enter total row and store it in an integer variable row.
Take first outer for loop to keep track of number of rows.
Take first inner for loop to print spaces .
Take second inner for loop for printing stars.
Then go on printing the star symbol according to loop.

JAVA Code:

Static Star Character
User Input Character

Method-1: Static Star Character

import java.util.*;
public class Main 
{    
    public static void main(String args[])   
    {   
        // taking variable for loop iteration and row .
        int row ,c,r,k;
        //creating object 
        Scanner s = new Scanner(System.in);
        // entering the number of row
        System.out.print("Enter rows : ");
        row = s.nextInt();
        for (r = 1; r <= row; r++)
         {
            if(r % 2 != 0)
                k = r + 1 ;
            else
                k = r;
            //  loop for printing spaces
            for (c = row; c > k; c--)
                System.out.print(" ");
            //  loop for printing spaces
            for (c = 0; c < k; c++)
                System.out.print("* ");
            System.out.println();
        }
    }
}

Output :

Enter row :  10

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

Method-2: User Input Character

import java.util.*;
public class Main 
{    
    public static void main(String args[])   
    {   
        // taking variable for loop iteration and row .
        int row ,c,r,k;
        //creating object 
        Scanner s = new Scanner(System.in);
        // entering the number of row
        System.out.print("Enter rows : ");
        row = s.nextInt();
        // entering any character
        System.out.print("Enter character : ");
        char stair = s.next().charAt(0);
        for (r = 1; r <= row; r++)
         {
            if(r % 2 != 0)
                k = r + 1 ;
            else
                k = r;
            //  loop for printing spaces
            for (c = row; c > k; c--)
                System.out.print(" ");
            //  loop for printing spaces
            for (c = 0; c < k; c++)
                System.out.print(stair+" ");
            System.out.println();
        }
    }
}

Output :

Enter row :  10
Enter character : *

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

C Code:

#include <stdio.h>
int main() 
{
    int row,r,c,k ;
    printf("Enter rows: ");
    scanf("%d", &row);
       for (r = 1; r <= row; r++)
         {
            if(r % 2 != 0)
                k = r + 1 ;
            else
                k = r;
            for (c = row; c > k; c--)
                 printf(" ");
            for (c = 0; c < k; c++)
                 printf("* ");
             printf("\n");
        }
   return 0;
}

Output :

Enter row :  10

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

C++ Code:

#include <iostream>
using namespace std;
int main()
{
    int row,r,c,k ;
    cout << "Enter rows: ";
    cin>> row;
     for (r = 1; r <= row; r++)
         {
            if(r % 2 != 0)
                k = r + 1 ;
            else
                k = r;
            for (c = row; c > k; c--)
                 cout <<" ";
            for (c = 0; c < k; c++)
                 cout <<"* ";
             cout <<"\n";
        }
   return 0;
}

Output :

Enter row :  10

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

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