Print asterisk arrow using only While loops in Python

Question

I am trying to create an arrow out of asterisk's, where the amount of columns is entered by the user. Yes, I do know how to use for loops to accomplish this:

columns = int(input("How many columns? "))

while columns <= 0:

    print ("Invalid entry, try again!")

    columns = int(input("How many columns? "))

x = 1



for x in range(1, columns):

    for x in range(x):

        print(" ", end="")

    print("*")



for x in range(columns,0,-1): 

    for x in range(x):

        print(" ", end="")

    print("*")



#output looks like



"""

How many columns? 3

*

 *

  *

 *

*

"""

However my question is, how would I accomplish the same outcome using only while loops?

Thanks

Edit: I was going to post what I had thus far in trying to work it out myself, but it is now of no use!
Thank you all for your efficient varying answers! Much appreciated!

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Answer 1

This should do:

columns = int(input("How many columns? "))


while columns <= 0:
    print ("Invalid entry, try again!")
    columns = int(input("How many columns? "))

x = 1
while x < columns:
    y = 0
    while y < x:
        print(" ", end="")
        y += 1
    print("*")
    x += 1


x = columns
while x > 0:
    y = 0
    while y < x:
        print(" ", end="")
        y += 1
    print("*")
    x -= 1

Print asterisk arrow using only While loops in Python

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