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C program to print diamond pattern

The diamond pattern in C language: This code prints a diamond pattern of stars. The diamond shape is as follows:

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

Diamond pattern program in C

#include <stdio.h>

int main()
{
  int n, c, k;

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

  for (k = 1; k <= n; k++)
  {
    for (c = 1; c <= n-k; c++)
      printf(" ");

    for (c = 1; c <= 2*k-1; c++)
      printf("*");

    printf("\n");
  }

  for (k = 1; k <= n - 1; k++)
  {
    for (c = 1; c <= k; c++)
      printf(" ");

    for (c = 1 ; c <= 2*(n-k)-1; c++)
      printf("*");

    printf("\n");
  }

  return 0;
}

Output of program:
Diamond pattern C program output

Download Diamond program.

C program to print diamond using recursion

#include <stdio.h>

void print (int);

int main () {
   int rows;

   scanf("%d", &rows);

   print(rows);

   return 0;
}

void print (int r) {
   int c, space;
   static int stars = -1;
   
   if (r <= 0)
     return;
   
   space = r - 1;
   stars += 2;
     
   for (c = 0; c < space; c++)
      printf(" ");
   
   for (c = 0; c < stars; c++)
      printf("*");
   
   printf("\n");
   
   print(--r);
   
   space = r + 1;
   stars -= 2;
   
   for (c = 0; c < space; c++)
      printf(" ");
   
   for (c = 0; c < stars; c++)
      printf("*");
     
   printf("\n");
}