Why i get output like this? In the last line of code i just print(f) but the output is different from the input variable.

Question

def myfunc(v)
v*=3
print(v)

v=3
myfunc(v)
print(v)

f=[1,2]
myfunc(f)
print(f)

output is:

27
3
[1,2,1,2,1,2]
[1,2,1,2,1,2] 👈how i get this kind of output

Answer 1

Arrays are object, so you pass in argument the address of the object. Then, the function modify the object, that's why you get a different output.

Answer 2

Excuse me if you don't understand, I'm a bad teacher! 😢

Answer 3

thank you so much Théophile

Answer 4

You're welcome!