6. Variable Types¶
Built-In Types : 12
6.1. Basic¶
Mutable Object
6.2. Pointer¶
>>> i = 5
>>> j = i
>>> j = 3
>>> print(i)
5
We see that i refers to an integer on memory has value 5 at first line, then j refers to i, means j also refers to 5. But when we change j =3, that means j points to another location on memory. Because i is an integer which is an immutable object, so there’is not any change on i. And whats about mutable object list ?
>>> a = [0, 1, 2, 3, 4]
>>> b = a
>>> b[2] = 9999
>>> a
[0, 1, 9999, 3, 4]
If 2 lists a and b refer at same object, when a changes, b changes also !