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Half Pyramid Star Pattern in C

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In this tutorial, we will write a program to display half pyramid patterns in C programming language. We will create a star pattern in C using for loop. So you may go through the following topic in C.

1. Right half pyramid in C

Right angle triangle pattern in C.

#include <stdio.h>

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

  printf("Enter the no. of rows: ");
  scanf("%d", &rows);

  for (i = 1; i <= rows; ++i)
  {
    for (j = 1; j <= i; ++j)
    {
      printf("* ");
    }

    printf("\n");
  }

  return 0;
}

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

2. Left half pyramid in C

Left right angle triangle pattern in C.

#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 = 1; j <= rows - i; j++)
      printf(" ");

    for (k = 1; k <= i; k++)
      printf("*");

    printf("\n");
  }

  return 0;
}

Output:

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

3. Inverted right half pyramid pattern in C

#include <stdio.h>

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

  printf("Enter the no. of rows: ");
  scanf("%d", &rows);

  for (i = rows; i >= 1; --i)
  {
    for (j = 1; j <= i; ++j)
      printf("* ");

    printf("\n");
  }

  return 0;
}

Enter the no. of rows: 6
* * * * * *
* * * * *
* * * *
* * *
* *
*

4. Inverted left half pyramid pattern in C

#include <stdio.h>

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

  printf("Enter the no. of rows: ");
  scanf("%d", &rows);

  for (i = 1; i <= rows; i++)
  {
    for (j = 1; j <= rows; j++)
    {
      if (j < i)
        printf(" ");
      else
        printf("*");
    }

    printf("\n");
  }

  return 0;
}

Output:

Enter the no. of rows: 8 
********
 *******
  ******
   *****
    ****
     ***
      **
       *

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