While statement explanation

[alkhufu2]

I am new to Python. I get while and for loops pretty well so far but I DO NOT understand the output of this code. Please explain this. I would most appreciate it.

n = 3
while n > 0:
    print(n + 1, end=' ')
    n -= 1
else:
    print(n)

Output:
4 3 2 0

Thank you for any help!