Left Half Pyramids in C using Numbers

In this tutorial, we will learn and write codes for various half pyramids number patterns in C programming language. However, in this tutorial, we will create a numeric pattern in C using for loop. So you may go through the following topic in C.

• for loop in C : loops plays a key role to achieve various patterns in any programming language. Mastering patterns means having excellent grasp at loops.

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Left Half Pyramids in C using Numbers

We will look at the following topic of pyramid patterns in C. Each of the programs is consists of different number patterns.

• Left half pyramid
• Inverted left half pyramid

Left half pyramid pattern of numbers in C

Pattern 1:

#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(" %d", k);

    printf("\n");
  }

  return 0;
}

Output:

Enter the no. of rows: 5
         1
       1 2
     1 2 3
   1 2 3 4
 1 2 3 4 5

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Inverted left half pyramid patterns of Numbers in C

Pattern 1:

#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 <= i; j++)
      printf("  ");

    for (k = i; k <= rows; k++)
      printf(" %d", k);

    printf("\n");
  }

  return 0;
}

Output:

Enter the no. of rows: 5
   1 2 3 4 5
     2 3 4 5
       3 4 5
         4 5
           5

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