C Program to Print Butterfly Pattern

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Write a Program to print the below pattern for the given input number.

Constraints

1 <= input <=9
 Sample Input 1

5

Sample Output 1

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

Code:

#include <stdio.h>

int main()
{
    int n;
    scanf("%d", &n);

    for (int i = 1; i <= n; i++)
    {
        for (int j = 1; j <= i; j++)
        {
            printf("*");
        }

        int s = 2 * n - 2 * i;
        for (int j = 1; j <= s; j++)
        {
            printf(" ");
        }
        for (int k = 1; k <= i; k++)
        {
            printf("*");
        }
        printf("\n");
    }

    for (int i = n - 1; i >= 1; i--)
    {
        for (int j = 1; j <= i; j++)
        {
            printf("*");
        }

        int s = 2 * n - 2 * i;
        for (int j = 1; j <= s; j++)
        {
            printf(" ");
        }

        for (int k = 1; k <= i; k++)
        {
            printf("*");
        }
        printf("\n");
    }
    return 0;
}
Code language: C/AL (cal)

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