How to print pyramid star patterns in c using for loop (easiest way)

 Pyramid pattern in c 

Today we are going to learn to print star pyramid patterns in c using for loop. To understand these very clearly you need to know about

1. For loop in c
2. Nested for loop in c

If you have clear knowledge about the above concepts then move on to level 2.

Example 1.

#include<stdio.h>
int main()
{
  int len=9;
  int space=len/2;
 for (int i=1; i<=len;i++)
 {
   //print spaces
   for(int s=1;s<=space;s++)
   {
     printf("   ");
     
   }
   // print stars
   for(int j=1;j<=i;j++)
   {
     printf(" * ");
     
   }
   printf("\n");
   space--;
   i++;
 }
  return 0;
}

output

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

Example 2:

Write a program to print right angle star pattern in c

#include<stdio.h>
int main()
{
  for (int i=1;i<=9;i++)
  {
    for(int j=1;j<=i;j++)
    {
      printf("* ");
    }
    printf("\n");
  }
  return 0;
}

output:

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

Example 3

write a program to print a square star pattern

#include<stdio.h>
int main()
{
  for (int i=1;i<=9;i++)
  {
    for(int j=1;j<=9;j++)
    {
      printf("* ");
    }
    printf("\n");
  }
  return 0;
}

output

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

Example 3

Write a program in c to print mirrored right angle triangle

#include<stdio.h>
int main()
{
  for (int i=1;i<=9;i++)
  {
    // print space=(n-i) where n=9
     for(int j=1;j<=9-i;j++)
    {
      printf("  ");
    }
    for(int j=1;j<=i;j++)
    {
      printf("* ");
    }
    printf("\n");
  }
  return 0;
}

output

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

Example 3

Write a program to print an inverted right triangle star pattern

#include<stdio.h>
int main()
{
  for (int i=1;i<=9;i++)
  {
    for(int j=9;j>=i;j--)
    {
      printf("* ");
    }
    printf("\n");
  }
  return 0;
}

output

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