Python (day1)-Variable Quiz

Here is a topic:

A = 3

b = A

A = 5

Print (A, B)

What is the value of the last output of the program, A/b?

Think about it first, and then we'll take a look at the correct answer:

The value of correct answer a is 5, the value of B is 3, why doesn't the value of B change with the value of a? Let's analyze Why:

Here we first introduce a function ID (), which can look at the memory address of the variable; OK, here's the analysis:

Split the program, assign 3 to a first, and then look at the memory address

Assign A to B, and then look at the memory address of B

As you can see, the memory addresses of B and a are the same

Assign 5 to A to see the memory address of a

You can see that A's memory address has changed and a points to a new memory address.

The entire process is as follows:

Python (day1)-Variable Quiz