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Printing hollow triangle in python

# Generating Hollow Pyramid Pattern Using Stars

row = int(input('Enter number of rows required: '))

for i in range(row):
    for j in range(row-i):
        print(' ', end='') # printing space required and staying in same line
    
    for j in range(2*i+1):
        if j==0 or j==2*i or i==row-1:
            print('*',end='')
        else:
            print(' ', end='')
    print() # printing new line

Source: codesansar.com

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