In the message for the following code I did'nt understand why '0' came in the output. Can anyone help me

Question

n = 3

while n > 0:
print(n + 1)
n -= 1
else:
print(n)

output:
4
3
2
0

Answer 1

Hi, Harsha Koganti !

First you print out n + 1 three times in your while loop:

Loop 1: n = 3
-> print(n+1) = 3+1 = 4
Then you set: n-= 1 -> n = 2

Loop 2: n = 2
-> print(n+1) = 2+1 = 3
Then you set: n-= 1 -> n = 1

Loop 3: n = 1
-> print(n+1) = 1+1 = 2
Then you set: n-= 1 -> n = 0

Now n = 0, and in your else statement you print it out:

else: n = 0
-> print(n)
0

Answer 2

Thank you very much Miss Somya and Mrs Per Bratthammar