Print Half Pyramid Pattern of start in C++ language

C-plus-plus-Patterns-Programs

In this article, we will learn how to Print the Half Pyramid Pattern of start in C++ language. We will try to use two different techniques to print this pattern.

  • Using normal for loop to print Pyramid pattern.
  • Using decrement Operator in for loop to print Pyramid pattern.

1. Print Half Pyramid Pattern of start in C++ language using for loop

Desired Output:
*
* *
* * *
* * * *
* * * * *

#include <iostream>
using namespace std;
int main()
{

  int num;

  cout<<"Please enter the size for Pyramid: ";
  cin>>num;

  for(int row=1;row<=num;row++)
  {
    for(int col=1;col<=row;col++)
    {
      cout<<"* ";
    }

    cout<<"\n";
  }

  return 0;
}

Actual Output:

Please enter the size for Pyramid: 7
* 
* * 
* * * 
* * * * 
* * * * * 
* * * * * * 
* * * * * * *

2. Using decrement Operator in for loop to print Pyramid pattern

In this example, we are using the for loop with a decrement operator for the Pyramid pattern print.

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#include <iostream>
using namespace std;
int main()
{
  int num;

  cout<<"Please enter the size for Pyramid: ";
  cin>>num;

  for(int i=num; i>=1; i--)
  {
    for(int j=i;j<=num;j++)
    {
      cout<<"* ";
    }
    cout<<"\n";
  }

  return 0;
}

Output

Please enter the size for Pyramid: 7
* 
* * 
* * * 
* * * * 
* * * * * 
* * * * * * 
* * * * * * *

In this example, we are using the for loop with decrement operator in the inner for loop to print the Pyramid pattern.

#include <iostream>
using namespace std;
int main()
{
  for(int i=1;i<=5;i++)
  {
     for(int j=i;j>=1;j--)
     {
       cout<<"* ";
     }

     cout<<"\n";
  }
  return 0;
}

Output

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

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