Python while loop ( doesnt comes out from while loop )

Question

I want this python code comes out from loop when I enter 0 as input number of "num" variable But it continues printing these three lines constantly

Thanks

num = 10     #10 is dummy number for starting loop 
while(num!=0):
    print("1)Test func1")
    print("2)Test func2")
    print("0)Exit")
    num = input("Enter a number:")

print("Comes out from while loop!")

Marcus.Aurelianus · Accepted Answer · 2018-07-17T06:00:44.453

3

There reason behind is that the input takes input as a string and you have to either convert it to int:

num = int(input("Enter a number:"))

or change the while loop:

while(num!='0'):

edited Jul 17 '18 at 06:00

answered Jul 17 '18 at 05:59

Marcus.Aurelianus

1,520
10
22

While your code snippet is correct, its best to provide at least some explanation to accompany it. – Dillon Davis Jul 17 '18 at 06:00
@ Dillon Davis , implemented, thanks! – Marcus.Aurelianus Jul 17 '18 at 06:01
Thanks .. It works properly ;) – MohmSh Jul 17 '18 at 06:02
@Mohammad_B_Shirdareh, consider accepting the answer by clicking the check on the left side of the answer, it will remove the question from the question queue and distribute the points around, thanks. – Marcus.Aurelianus Jul 17 '18 at 06:04

score 0 · Answer 2 · answered Jul 17 '18 at 06:05

0

print takes input as string , in order to come out of loop use num = int(input("Enter a number:"))

it will consider num variable as an integer but not an string and will come out of the loop.

answered Jul 17 '18 at 06:05

rachit17

24
3

score -1 · Answer 3 · answered Jul 17 '18 at 06:05

You have got a correct answer before this but you can change your code too:

while True:
    print("1)Test func1")
    print("2)Test func2")
    print("0)Exit")
    num = input("Enter a number:")
    if num == '0':
        break

print("Comes out from while loop!")

at the begining while always get True, you don't need to set value, 'break' means 'stop current loop and exit'

Python while loop ( doesnt comes out from while loop )

3 Answers3