Python Variables

Question

If we declare a variable in python like a=10
And later in the code if we declare change that as a=20
What will happen to the memory which is having 10

Answer 1

I think by doing this, you'll Overwrite the value of that variable and the previous memory location which you allocated to that variable won't change.

But you'll miss the previous value.

Answer 2

the old data 10 is garbage collected if no name still refers to it

Answer 3

Try it out yourself with this code:

a = 10
print(id(a))
a = 'not ten'
print(id(a))
b = 'not ten'
print(id(b))
b = 10
print(id(b))

I think the variable will stick around for some time.