C++ Program to Print Right Triangle, Half Pyramid Pattern

C++ programs to print the half pyramid pattern have been given here. Both the right half and left half of the pyramid using *, numbers and letters have been covered.

Page content(s):

1. Program & Output: Right half pyramid

 1.1. Using *

 1.2. Using numbers

 1.3. Using alphabets

2. Program & Output: Left half pyramid

 2.1. Using *

 2.2. Using numbers

 2.3. Using alphabets

3. Program & Output: Inverted half pyramid

 3.1. Using *

 3.2. Using numbers

 3.3. Using alphabets

1. Program & output to print the right half pyramid pattern

1.1. C++ Program & output to print the right half pyramid pattern using *

Code has been copied

/*****************************
  	alphabetacoder.com
C++ program to print the right
half pyramid pattern using *
******************************/

#include <iostream>

using namespace std;

int main() {
    // declare variables
    int row, i, j;

    // take input
    cout << "Enter the number of rows: ";
    cin >> row;

    // new line
    cout << endl;

    // display the pattern
    for (i = 1; i <= row; i++) {
        // print *
        for (j = 1; j <= i; j++) {
            cout << "*";
        }
        // new line
        cout << endl;
    }

    return 0;
}

Output

Enter the number of rows: 6

*

**

***

****

*****

******

1.2. C++ Program & output to print the right half pyramid pattern using numbers

Code has been copied

/*********************************
  	alphabetacoder.com
C++ program to print the right
half pyramid pattern using numbers
**********************************/

#include <iostream>

using namespace std;

int main() {
    // declare variables
    int row, i, j;

    // take input
    cout << "Enter the number of rows: ";
    cin >> row;

    // new line
    cout << endl;

    // display the pattern
    for (i = 1; i <= row; i++) {
        // print numbers
        for (j = 1; j <= i; j++) {
            cout << j << " ";
        }
        // new line
        cout << endl;
    }

    return 0;
}

Output

Enter the number of rows: 6

1

1 2

1 2 3

1 2 3 4

1 2 3 4 5

1 2 3 4 5 6

1.3. C++ Program & output to print the right half pyramid pattern using alphabets

Code has been copied

/***********************************
       alphabetacoder.com
C++ program to print the right
half pyramid pattern using alphabets
************************************/

#include <iostream>

using namespace std;

int main() {
    // declare variables
    int row, i, j;

    // take input
    cout << "Enter the number of rows: ";
    cin >> row;

    // new line
    cout << endl;

    // display the pattern
    for (i = 1; i <= row; i++) {
        // print letters
        for (j = 1; j <= i; j++) {
            cout << (char)(j + 64) << " ";
        }
        // new line
        cout << endl;
    }

    return 0;
}

Output

Enter the number of rows: 6

A

A B

A B C

A B C D

A B C D E

A B C D E F

2. Program & output to print the left half pyramid pattern

2.1. C++ Program & output to print the left half pyramid pattern using *

Code has been copied

/********************************
    alphabetacoder.com
C++ program to print the left half
of the pyramid pattern using *
*********************************/

#include <iostream>

using namespace std;

int main() {
    // declare variables
    int row, i, j;

    // take input
    cout << "Enter the number of rows: ";
    cin >> row;

    // new line
    cout << endl;

    // display the pattern
    for (i = 1; i <= row; i++) {
        // print space
        for (j = 1; j <= row - i; j++) {
            cout << " ";
        }
        // print *
        for (j = 1; j <= i; j++) {
            cout << "*";
        }
        // new line
        cout << endl;
    }

    return 0;
}

Output

Enter the number of rows: 6

     *

    **

   ***

  ****

 *****

******

2.2. C++ Program & output to print the left half pyramid pattern using numbers

Code has been copied

/***********************************
    	alphabetacoder.com
C++ program to print the left half
of the pyramid pattern using numbers
************************************/

#include <iostream>

using namespace std;

int main() {
    // declare variables
    int row, i, j;

    // take input
    cout << "Enter the number of rows: ";
    cin >> row;

    // new line
    cout << endl;

    // display the pattern
    for (i = 1; i <= row; i++) {
        // print space
        for (j = 1; j <= 2 * (row - i); j++) {
            cout << " ";
        }
        // print numbers
        for (j = 1; j <= i; j++) {
            cout << j << " ";
        }
        // new line
        cout << endl;
    }

    return 0;
}

Output

Enter the number of rows: 5

        1

      1 2

    1 2 3

  1 2 3 4

1 2 3 4 5

2.3. C++ Program & output to print the left half pyramid pattern using alphabets

Code has been copied

/*************************************
    	alphabetacoder.com
C++ program to print the left half
of the pyramid pattern using alphabets
**************************************/

#include <iostream>

using namespace std;

int main() {
    // declare variables
    int row, i, j;

    // take input
    cout << "Enter the number of rows: ";
    cin >> row;

    // new line
    cout << endl;

    // display the pattern
    for (i = 1; i <= row; i++) {
        // print space
        for (j = 1; j <= 2 * (row - i); j++) {
            cout << " ";
        }
        // print letters
        for (j = 1; j <= i; j++) {
            cout << (char)(j + 64) << " ";
        }
        // new line
        cout << endl;
    }

    return 0;
}

Output

Enter the number of rows: 5

        A

      A B

    A B C

  A B C D

A B C D E

3. Program & output to print the right half pyramid pattern

3.1. C++ Program & output to print the inverted half pyramid pattern using *

Code has been copied

/*********************************
	alphabetacoder.com
C++ program to print the inverted
half pyramid pattern using *
**********************************/

#include <iostream>

using namespace std;

int main() {
    // declare variables
    int row, i, j;

    // take input
    cout << "Enter the number of rows: ";
    cin >> row;

    // new line
    cout << endl;

    // display the pattern
    for (i = 1; i <= row; i++) {
        // print *
        for (j = row; j >= i; j--) {
            cout << "*";
        }
        // new line
        cout << endl;
    }

    return 0;
}

Output

Enter the number of rows: 6

******

*****

****

***

**

*

3.2. C++ Program & output to print the inverted half pyramid pattern using numbers

Code has been copied

/*********************************
	alphabetacoder.com
C++ program to print the inverted
half pyramid pattern using numbers
**********************************/

#include <iostream>

using namespace std;

int main() {
    // declare variables
    int row, i, j;

    // take input
    cout << "Enter the number of rows: ";
    cin >> row;

    // new line
    cout << endl;

    // display the pattern
    for (i = 1; i <= row; i++) {
        // print numbers
        for (j = row; j >= i; j--) {
            cout << (row - j + 1) << " ";
        }
        // new line
        cout << endl;
    }

    return 0;
}

Output

Enter the number of rows: 6

1 2 3 4 5 6

1 2 3 4 5

1 2 3 4

1 2 3

1 2

1

3.3. C++ Program & output to print the inverted half pyramid pattern using alphabets

Code has been copied

/***********************************
  	alphabetacoder.com
C++ program to print the inverted
half pyramid pattern using alphabets
************************************/

#include <iostream>

using namespace std;

int main() {
    // declare variables
    int row, i, j;

    // take input
    cout << "Enter the number of rows: ";
    cin >> row;

    // new line
    cout << endl;

    // display the pattern
    for (i = 1; i <= row; i++) {
        // print letters
        for (j = row; j >= i; j--) {
            cout << (char)(row - j + 65) << " ";
        }
        // new line
        cout << endl;
    }

    return 0;
}

Output

Enter the number of rows: 6

A B C D E F

A B C D E

A B C D

A B C

A B

A