Python Program to Print Hollow Right Pascals Star Triangle

Write a Python program to print hollow right pascals star triangle pattern using for loop. 

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

print("====Hollow Right Pascals Star Triangle Pattern====")

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

for i in range(1, rows + 1):
    for j in range(rows - 1, i - 1, -1):
        if j == rows - 1 or j == i or i == rows:
            print('*', end = '')
        else:
            print(end = ' ')
    for k in range(1, i):
        print(end = ' ')
    print()
Python Program to Print Hollow Right Pascals Star Triangle

This Python program prints the hollow right pascals star triangle pattern using a while loop.

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

print("====Hollow Right Pascals Star Triangle Pattern====")
i = 1

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

i = 1
while(i <= rows - 1):
    j = rows - 1
    while(j >= i):
        if j == rows - 1 or j == i or i == rows:
            print('*', end = '')
        else:
            print(end = ' ')
        j = j - 1
    k = 1
    while(k < i):
        print(end = ' ')
        k = k + 1
    print()
    i = i + 1
Enter Hollow Right Pascals Star Triangle Pattern Rows = 8
====Hollow Right Pascals Star Triangle Pattern====
*
**
* *
*  *
*   *
*    *
*     *
*      *
*     *
*    * 
*   *  
*  *   
* *    
**     
*

In this Python example, we used the pyHollowRightPascalsStar function to display the hollow right pascals triangle pattern of a given character.

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

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

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

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

print("====Hollow Right Pascals Star Triangle Pattern====")

pyHollowRightPascalStar(rows, ch)
Enter Hollow Right Pascals Star Triangle Pattern Rows = 10
Symbol to use in Hollow Right Pascals Triangle Pattern = #
====Hollow Right Pascals Star Triangle Pattern====
#
##
# #
#  #
#   #
#    #
#     #
#      #
#       #
#        #
#       #
#      # 
#     #  
#    #   
#   #    
#  #     
# #      
##       
#

About Suresh

Suresh is the founder of TutorialGateway and a freelance software developer. He specialized in Designing and Developing Windows and Web applications. The experience he gained in Programming and BI integration, and reporting tools translates into this blog. You can find him on Facebook or Twitter.