Half Diamond Star Pattern in C1 min read

We will write two different patterns diamond shape programs in C. So you may go through the following topic in C first.

1. Right half diamond pattern in C

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#include <stdio.h>
 
int main()
{
  int i, j, rows;
 
  printf("Enter the no. of rows: ");
  scanf("%d", &rows);
 
  for (i = 0; i <= rows - 1; i++)
  {
    for (j = 0; j <= i; j++)
      printf("* ");
 
    printf("\n");
  }
 
  for (i = rows - 1; i >= 0; i--)
  {
    for (j = 0; j <= i - 1; j++)
      printf("* ");
 
    printf("\n");
  }
 
  return 0;
}

Enter the no. of rows: 5
*
* *
* * *
* * * *
* * * * *
* * * *
* * *
* *
*

2. Left half diamond pattern in C

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#include <stdio.h>
 
int main()
{
  int i, j, k, rows;
 
  printf("Enter the no. of rows: ");
  scanf("%d", &rows);
 
  for (i = 1; i <= rows; i++)
  {
    for (j = i; j < rows; j++)
      printf(" ");
 
    for (k = 1; k <= i; k++)
      printf("*");
 
    printf("\n");
  }
 
  for (i = rows; i >= 1; i--)
  {
    for (j = i; j <= rows; j++)
      printf(" ");
 
    for (k = 1; k < i; k++)
      printf("*");
 
    printf("\n");
  }
 
  return 0;
}
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Enter the no. of rows: 5
    *
   **
  ***
****
*****
****
  ***
   **
    *

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