C Program to Generate Hollow Diamond Pattern Using Stars

Generating hollow diamond shape pattern made up of stars in C programming language.

Hollow Diamond Pattern C Program

#include

int main()
{
    int i, n, j;

    printf("Enter number of lines: ");
    scanf("%d", &n);

    /* Upper part of diamond */
    for(i=1;i<=n;i++)
    {
        for(j=1;j<=n-i;j++)
        {
            printf(" ");
        }
        for(j=1;j<=2*i-1;j++)
        {
            j==1||j==2*i-1?printf("*"):printf(" ");
        }
        printf("\n");
    }
    /* Lower part of diamond patter */

    for(i=n-1;i>=1;i--)
    {
        for(j=1;j<=n-i;j++)
        {
            printf(" ");
        }
        for(j=1;j<=2*i-1;j++)
        {
            j==1||j==2*i-1?printf("*"):printf(" ");
        }
        printf("\n");
    }

    return 0;
}

Output of Above Program

Enter number of lines: 12
           *
          * *
         *   *
        *     *
       *       *
      *         *
     *           *
    *             *
   *               *
  *                 *
 *                   *
*                     *
 *                   *
  *                 *
   *               *
    *             *
     *           *
      *         *
       *       *
        *     *
         *   *
          * *
           *