Program to print a butterfly shape star pattern

SOURAV KUMAR PATRA August 08, 2020 
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Problem statement:- Program to print a butterfly shape star pattern.


 Data requirement:-

  Input Data:- row_size

  Output Data:- *

  Additional Data:-in or inn(for python), out, print_control_x

Program in C

Here is the source code of the C Program to print a butterfly shape star pattern.

Code:

#include<stdio.h>
int main()
{
    printf("Enter the row size(Odd Number):");
    int row_size;
    scanf("%d",&row_size);
    int in,out,p;
    int print_control_x=1;

      for(out=1;out<=row_size;out++)
       {
           for(in=1;in<=row_size;in++)
           {
               if(in<=print_control_x || in>=row_size-print_control_x+1)
               {
                printf("*");
                 }
               else
               {
                 printf(" ");
               }
             }
           if(out<=row_size/2)
           print_control_x++;
           else
              print_control_x--;
            printf("\n");
     }
}

Input/Output:
Enter the row size(Odd Number):5
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Program in C++

Here is the source code of the C++ Program to print a butterfly shape star pattern.

Code:

#include<iostream>
using namespace std;
int main()
{
    cout<<"Enter the row size(Odd Number):";
    int row_size;
    cin>>row_size;
    int in,out;
    int print_control_x=1;
       for(out=1;out<=row_size;out++)
       {
           for(in=1;in<=row_size;in++)
           {
               if(in<=print_control_x || in>=row_size-print_control_x+1)
               {
               cout<<"*";
                 }
               else
               {
                 cout<<" ";
               }
             }
            if(out<=row_size/2)
           print_control_x++;
           else
              print_control_x--;
            cout<<"\n";
     }
}

Input/Output:
Enter the row size(Odd Number):7
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Program in Java

Here is the source code of the Java Program to print a butterfly shape star pattern.

Code:

import java.util.Scanner;
public class ButterflyShapeStarPattern {

public static void main(String[] args) {
Scanner cs=new Scanner(System.in);
        System.out.println("Enter the row size(Odd Number):");
       int out,in;
       int row_size=cs.nextInt();
       int print_control_x=1;
       for(out=1;out<=row_size;out++)
       {
           for(in=1;in<=row_size;in++)
           {
               if(in<=print_control_x || in>=row_size-print_control_x+1)
               {
                  System.out.printf("*");
               }
               else
               {
                System.out.printf(" ");    
               }
           }
           if(out<=row_size/2)
           print_control_x++;
           else
              print_control_x--;
           System.out.println(); 
       }
       cs.close();
}
}

Input/Output:
Enter the row size:
5
*   *
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*****
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Program in Python

Here is the source code of the Python Program to print a butterfly shape star pattern.

Code:

row_size=int(input("Enter the row size:"))
print_control_x=1
for out in range(1,row_size+1):
    for inn in range(1,row_size+1):
        if inn<=print_control_x or inn>=row_size-print_control_x+1:
            print("*",end="")
        else:
            print(" ", end="")
    if out <= row_size // 2:
        print_control_x+=1
    else:
        print_control_x-=1
    print("\r")

Input/Output:
Enter the row size:9
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*********
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