Different Half Pyramid Patterns

Number Half Pyramid 

Repetitive numbers

Problem Statement: Write a program to print a half pyramid where numbers are repetitive in C++.

Solution:

#include <iostream>
using namespace std;
int main()
{
  int row = 5;
 for(int i=1;i<=row;i++)
  {
      for(int j=1;j<=i;j++)
      {
           cout<<i<<” “;
      }
      cout<<"\n";
  }
}

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Output :

1
2 2
3 3 3
4 4 4 4
5 5 5 5 5

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Non Repetitive numbers

Problem Statement: Write a program to print a half pyramid where numbers are non-repetitive in C++.

Solution:

#include <iostream>
using namespace std;
int main()
{
 int row = 5;
 for(int i=1;i<=row;i++)
  {
      for(int j=1;j<=i;j++)
      {
           cout<<j<<” “;
      }
      cout<<"\n";
  }
}

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Output:

1
1 2
1 2 3
1 2 3 4
1 2 3 4 5

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Alphabet Half Pyramid 

Repetitive alphabets

Problem Statement: Write a program to print a half pyramid where alphabets are repetitive in C++.

Solution:

#include <iostream>
using namespace std;

int main()
{
    int row = 5;
    int letter = 65;
 
    for (int i = 0; i < row; i++) {
        for (int j = 0; j <= i; j++) {
            char ch = char(letter);
            cout << ch << " ";
        }
        letter = letter + 1;
        cout << endl;
    }
    return 0;
}

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Output :

A
B B
C C C
D D D D 
E E E E E

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Non - repetitive alphabets

Problem Statement: Write a program to print a half pyramid where alphabets are non-repetitive in C++.

Solution:

#include <iostream>
using namespace std;

int main()
{
    int row = 5;

    for (int i = 0; i < row; i++) {
        int letter = 65;
        for (int j = 0; j <= i; j++) {
            char ch = char(letter);
            cout << ch << " ";
            letter = letter + 1;
        }
       
        cout << endl;
    }
    return 0;
}

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Output :

A
A B
A B C
A B C D 
A B C D E

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Frequently Asked Questions

What are the different types of loops?

There are two types of loops: entry control and exit control loops. For and while loop is entry control and do while loop is exit control loop.

Can we use a while loop instead of for loop?

Yes, we can use a while loop instead of for loop, but while doing pattern problems a loop is preferred.

Conclusion

In this article, we have extensively discussed the implementation of different half pyramids in the C++ programming language. 

Recommended Readings:

• Mathematical Puzzles
• Logical Puzzles
• Pattern Based Puzzles
• Half Pyramid Number Pattern
• Half Pyramid
• Inverted Half Pyramids
• Inverted Half Diamond Pattern

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