我需要使用数字组合功能的帮助

Question

I'm new to programming and right now I'm learning about functions and everything related to them. I've been making some example of my own, and I ran into a problem.

 def test(x):
    number = x + 1
    return (number)
def test2(y):
    number2 = test(y) + 2
    print (number2)
test2(1)

If I print this function, it would work. However I don't understand something. Why is it that when I put number 1 into test2(y), it also goes into test(x)? Why does this happen?

Answer 1

You defined def test2(y): so when you run test2(1) then it creates local variable y inside test2 and it assigns y = 1 - and then it starts to execute commands inside test2 .

Inside test2 you execute test(y) so it gets value from y and executes test(1) . And again: you defined def test(x) so it creates local variable x inside test , and it assigns x = 1 and then it starts to executes commands inside test . So now 1 is inside test