Python Program to Print Inverted Right Triangle Star Pattern

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Given the number of rows of the Triangle, the task is to Print an Inverted Right Triangle Star Pattern in C, C++, and Python.

Examples:

Example1:

Input:

Given number of rows of the Inverted Right Triangle Pattern =13

Output:

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

Example2:

Input:

Given number of rows of the Inverted Right Triangle Pattern =9
Given character to print ='<'

Output:

< < < < < < < < < 
< < < < < < < < 
< < < < < < < 
< < < < < < 
< < < < < 
< < < < 
< < < 
< < 
<

Program to Print Inverted Right Triangle Star Pattern in C, C++, and Python

Below are the ways to print an Inverted Right Triangle Star Pattern in C, C++, and Python.

Method #1: Using For Loop(Star Character)

Approach:

  • Give the number of rows of the Inverted Right Triangle as static input and store it in a variable.
  • Loop from the given number of rows to 0 using For loop and take iterator value as m.
  • Loop till the iterator value of the first loop using another nested For loop.
  • Print the star and space character in the inner for loop.
  • Print the newline character after inner for loop.
  • The Exit of the Program.

1) Python Implementation

Below is the implementation:

# Give the number of rows of the Inverted Right Triangle as static input and store it in a variable.
triNumRows = 13
# Loop from the given number of rows to 0 using For loop and take iterator value as m.
for m in range(triNumRows, -1, -1):
    # Loop till the iterator value of the first loop using another nested For loop.
    for n in range(m):
        # Print the star and space character in the inner for loop.
        print('*', end=' ')
    # Print the newline character after inner for loop.
    print()

Output:

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

2) C++ Implementation

Below is the implementation:

#include <iostream>
using namespace std;

int main()
{

    // Give the number of rows of the Inverted Right
    // Triangle as static input and store it in a variable.
    int triNumRows = 5;
    // Loop from the given number of rows to 0 using For
    // loop and take iterator value as m.
    for (int m = triNumRows; m >= 0; m--) {

        // Loop till the iterator value of the first loop
        // using another nested For loop.
        for (int n = 0; n < m; n++) {
            // Print the star and space character in the
            // inner for loop.
            cout << "* ";
        }
        // Print the newline character after inner for loop.
        cout << endl;
    }

    return 0;
}

Output:

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

3) C Implementation

Below is the implementation:

#include <stdio.h>

int main()
{

    // Give the number of rows of the Inverted Right
    // Triangle as static input and store it in a variable.
    int triNumRows = 13;
    // Loop from the given number of rows to 0 using For
    // loop and take iterator value as m.
    for (int m = triNumRows; m >= 0; m--) {

        // Loop till the iterator value of the first loop
        // using another nested For loop.
        for (int n = 0; n < m; n++) {
            // Print the star and space character in the
            // inner for loop.
            printf("* ");
        }
        // Print the newline character after inner for loop.
        printf("\n");
    }
    return 0;
}

Output:

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

Method #2: Using For Loop(User Character)

Approach:

  • Give the number of rows of the Inverted Right Triangle as static input and store it in a variable.
  • Give the character to print as user input and store it in a variable.
  • Loop from the given number of rows to 0 using For loop and take iterator value as m.
  • Loop till the iterator value of the first loop using another nested For loop.
  • Print the given character and space character in the inner for loop.
  • Print the newline character after inner for loop.
  • The Exit of the Program.

1) Python Implementation

  • Give the number of rows of the Inverted Right Triangle as user input using int(input()) and store it in a variable.
  • Give the Character as user input using input() and store it in another variable.

Below is the implementation:

# Give the number of rows of the Inverted Right Triangle as user input using int(input()) and store it in a variable.
triNumRows = int(input(
    'Enter some random number of rows of the Inverted Right Triangle Pattern = '))
# Give the Character as user input using input() and store it in another variable.
givencharacter = input('Enter some random character = ')
# Loop from the given number of rows to 0 using For loop and take iterator value as m.
for m in range(triNumRows, -1, -1):
    # Loop till the iterator value of the first loop using another nested For loop.
    for n in range(m):
        # Print the given character with the space
        print(givencharacter, end=' ')
    # Print the newline character after inner for loop.
    print()

Output:

Enter some random number of rows of the Inverted Right Triangle Pattern = 7
Enter some random character = @
@ @ @ @ @ @ @ 
@ @ @ @ @ @ 
@ @ @ @ @ 
@ @ @ @ 
@ @ @ 
@ @ 
@

2) C++ Implementation

  • Give the number of rows of the Inverted Right Triangle as user input using cin and store it in a variable.
  • Give the Character as user input using cin and store it in another variable.

Below is the implementation:

#include <iostream>
using namespace std;

int main()
{

    // Give the number of rows of the Inverted Right
    // Triangle as user input using cin and store it in a
    // variable.
    int triNumRows;
    char givencharacter;
    cout << "Enter some random number of rows of the "
            "Inverted Right Triangle Pattern = "
         << endl;
    cin >> triNumRows;
    // Give the Character as user input using cin and store
    // it in another variable.
    cout << "Enter some random character = " << endl;
    cin >> givencharacter;
    cout << endl;

    // Loop from the given number of rows to 0 using For
    // loop and take iterator value as m.
    for (int m = triNumRows; m >= 0; m--) {

        // Loop till the iterator value of the first loop
        // using another nested For loop.
        for (int n = 0; n < m; n++) {
            // Print the given character with the space
            cout << givencharacter << " ";
        }
        // Print the newline character after inner for loop.
        cout << endl;
    }

    return 0;
}

Output:

Enter some random number of rows of the Inverted Right Triangle Pattern = 
15
Enter some random character = 
^
^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ 
^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ 
^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ 
^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ 
^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ 
^ ^ ^ ^ ^ ^ ^ ^ ^ ^ 
^ ^ ^ ^ ^ ^ ^ ^ ^ 
^ ^ ^ ^ ^ ^ ^ ^ 
^ ^ ^ ^ ^ ^ ^ 
^ ^ ^ ^ ^ ^ 
^ ^ ^ ^ ^ 
^ ^ ^ ^ 
^ ^ ^ 
^ ^ 
^

3) C Implementation

  • Give the number of rows of the Inverted Right Triangle as user input using scanf and store it in a variable.
  • Give the Character as user input using scanf and store it in another variable.

Below is the implementation:

#include <stdio.h>

int main()
{

    // Give the number of rows of the Inverted Right
    // Triangle as user input using scanf and store it in a
    // variable.
    int triNumRows;
    char givencharacter;
    // Give the Character as user input using scanf and
    // store it in another variable.

    scanf("%d", &triNumRows);
    scanf("%c", &givencharacter);
    printf("\n");
    // Loop from the given number of rows to 0 using For
    // loop and take iterator value as m.
    for (int m = triNumRows; m >= 0; m--) {

        // Loop till the iterator value of the first loop
        // using another nested For loop.
        for (int n = 0; n < m; n++) {
            // Print the given character and space character
            // in the inner for loop.
            printf("%c ", givencharacter);
        }
        // Print the newline character after inner for loop.
        printf("\n");
    }
    return 0;
}

Output:

9<
< < < < < < < < < 
< < < < < < < < 
< < < < < < < 
< < < < < < 
< < < < < 
< < < < 
< < < 
< < 
<

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