Program to print a butterfly shape Number pattern

  1         7

12      67

123  567

1234567

123  567

12      67

1          7

Problem statement:- Program to print a butterfly shape Number pattern.

 Data requirement:-

   Input Data:- row_size

  Output Data:- in or inn(for python)

  Additional Data:-out, print_control_x

Program in C

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

Code:

#include <stdio.h>
int main()
{
    printf("Enter the row size(Odd Number):");
    int row_size;
    scanf("%d", &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)
            {
                printf("%d", in);
            }
            else
            {
                printf(" ");
            }
        }
        if (out <= row_size / 2)
            print_control_x++;
        else
            print_control_x--;
        printf("\n");
    }
}

Input/Output:

Enter the row size(Odd Number):7

1          7

12      67

123  567

1234567

123  567

12      67

1          7

Program in C++

Here is the source code of the C++ Program to print a butterfly shape Number 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 << in;
            }
            else
            {
                cout << " ";
            }
        }
        if (out <= row_size / 2)
            print_control_x++;
        else
            print_control_x--;
        cout << "\n";
    }
}

Input/Output:

Enter the row size(Odd Number):5

1      5

12  45

12345

12  45

1      5

Program in Java

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

Code:

import java.util.Scanner;
public class ButterflyNumberPattern {
    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.print(in);
                } 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(Odd Number):7

1          7

12      67

123  567

1234567

123  567

12      67

1          7

Program in Python

Here is the source code of the Python Program to print a butterfly shape Number 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(inn, 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

1              9

12          89

123      789

1234  6789

123456789

1234  6789

123      789

12          89

1              9

More:-

C/C++/Java/Python Practice Question