While statement explanation

[nilamo]

Let's walk through the code, line by line, and keep track of what n is.

n = 3                       # 3
while n > 0:                # 3
    print(n + 1, end=' ')   # 3 (print 4)
    n -= 1                  # 2

while n > 0:                # 2
    print(n + 1, end=' ')   # 2 (print 3)
    n -= 1                  # 1

while n > 0:                # 1
    print(n + 1, end=' ')   # 1 (print 2)
    n -= 1                  # 0

else:
    print(n)                # 0