Extra line at start when printing a pattern using while loop

Question

This code prints a pattern of a series of asterisks, taking the params if the pattern is to be printed normally or inverted, and also requests the number of rows.

def print_pattern(rows):
    row = 0
    while row <= rows:
        output = row * "*" 
        row += 1
        print(output)

output = print_pattern(True, 3)

My expected output is this:

*
**
***

I instead get something like this, with an extra line on top


*
**
***

So why is this extra line left in the start?

Asked By: Illusioner_

||

Source

Answer 1

You started row at 0, so your first loop iteration prints "*" 0 times, aka a blank line. I’d suggest starting row at 1.

Answered By: Dominic

Extra line at start when printing a pattern using while loop

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