Python: Christmas Tree with user input for the base

Question

I’m trying to get a christmas tree, where the user can input the number of stars, which should be in the last row. The problem is, I don’t get, how to get the height from the number of stars in the last row.

So far, I got the tree with an input from the user for how high the tree should get.

eingabe = input("Bitte geben Sie die Höhe des Baumes ein: ")
eingabe = int(eingabe)
eingabe = eingabe + 1 
stern = "*"
for i in range(1, eingabe):
    x = (2 * i - 1) * stern
    print(x.center(100))

Asked By: st3i-n

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Source

Answer 1

The number of stars in the last row is:

stars = rows * 2 - 1

Therefore, the height of the tree, knowing the number of stars in the last row, is:

rows = (stars + 1) / 2

given that the number of stars must be odd because of the way you’re drawing it.

Answered By: Ian Moote

Python: Christmas Tree with user input for the base

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