C program to print hollow diamond of stars

Learn about C program to print hollow diamond of stars in the below code example. Also refer the comments in the code snippet to get a detailed view about what’s actually happening.

C program to print hollow diamond of stars

To print the pattern given below run the given C program. Give the required number of rows to print it.

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

Program:

#include<stdio.h>
int main()
{
  int n;

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

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

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

  return 0;
}

Output:

Enter number of rows: 5
     *
    * *
   *   *
  *     *
 *       *
  *     *
   *   *
    * *
     *

Hope above code works for you and Refer the below Related Codes to gain more insights. Happy coding and come back again.