Python Program to Print Hollow Right Triangle Star Pattern

Write a Python Program to Print Hollow Right Triangle Star Pattern using for loop. The nested for loops iterate from 1 to rows and i and if condition check for the outline values and print those stars.

rows = int(input("Enter Hollow Right Triangle Pattern Rows = "))

print("Hollow Right Triangle Star Pattern") 

for i in range(1, rows + 1):
    for j in range(1, i + 1):
        if i == 1 or i == rows or j == 1 or j == i:
            print('*', end = '')
        else:
            print(' ', end = '')
    print()

This Program prints the Hollow Right Triangle Star Pattern using a while loop.

rows = int(input("Enter Hollow Right Triangle Pattern Rows = "))

print("Hollow Right Triangle Star Pattern") 

i = 1
while(i <= rows):
    j = 1
    while(j <= i):
        if i == 1 or i == rows or j == 1 or j == i:
            print('*', end = '')
        else:
            print(' ', end = '')
        j = j + 1
    i = i + 1
    print()

Enter Hollow Right Triangle Pattern Rows = 12
Hollow Right Triangle Star Pattern
*
**
* *
*  *
*   *
*    *
*     *
*      *
*       *
*        *
*         *
************
>>> 

In this Python example, we created a hollowRightTriangle function to print the Hollow Right angled triangle Pattern. It replaces the hollow Hollow Right Triangle star with a given symbol.

def hollowRightTriangle(rows, ch):
    for i in range(1, rows + 1):
        for j in range(1, i + 1):
            if i == 1 or i == rows or j == 1 or j == i:
                print('%c' %ch, end = '')
            else:
                print(' ', end = '')
        print()

rows = int(input("Enter Hollow Right Triangle Pattern Rows = "))

ch = input("Symbol to use in Hollow Right Triangle = ")

print("Hollow Right Triangle Star Pattern")

hollowRightTriangle(rows, ch)

Enter Hollow Right Triangle Pattern Rows = 15
Symbol to use in Hollow Right Triangle = $
Hollow Right Triangle Star Pattern
$
$$
$ $
$  $
$   $
$    $
$     $
$      $
$       $
$        $
$         $
$          $
$           $
$            $
$$$$$$$$$$$$$$$
>>>