whats wrong with this code??

Question

Its around a week since i started learning python from javascript

I know this is a stupid question but why does this print up to 40 should it have printed as long as y is less than 20

https://code.sololearn.com/cKxRim5Z1MsB/?ref=app

Answer 1

When y is 20, it will print 40 as you have asked to print y*2, not y, if you were trying to make it count up by twos it would look like this:
def num(y):
while y < 20:
y+=2
print(y)

num(2)

I’m not sure if this fixes your problem

Answer 2

That's because you use print(y*2) which outputs the incremented y value multiplied by 2;
3 -> 6
4 -> 8
...
20 -> 40

Answer 3

It's because y*2 does not change the value of y

Answer 4

Thanks for the summary Eligijus

Answer 5

I think it is: Because you increased y before you printf(y*2)

def num(y):
while y < 20:
print(2*y)
y+=1

num(2)

Answer 6

Got it,Thanks you all :-)