C program to print hollow diamond of numbers

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

Contents

C program to print hollow diamond of numbers

To print the pattern as below run the below C code with required number of rows.

Program:

#include<stdio.h>
int main()
{
   int n, a=1;

   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("%d",a);
       else printf(" ");
     }
     a++;
     printf("\n");
   }

   a=n-1;

   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("%d",a);
       else printf(" ");
     }
     a--;
     printf("\n");
   }

   return 0;
}

Output:

Enter number of rows: 5
     1
    2 2
   3   3
  4     4
 5       5
  4     4
   3   3
    2 2
     1

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