The second bullet of python basics: basic data types

Variables in Python do not need to be declared, but each variable must be assigned a value before it is used, and the variable will not be created until the variable is assigned.

In Python, a variable is a variable, it has no type, what we mean by "type" is the type of the object in memory that the variable refers to.

The equal sign (=) is used to assign values ​​to variables.

The left side of the equals (=) operator is a variable name, and the right side of the equals (=) operator is the value stored in the variable.

counter = 100 # integer variable
miles = 1000.0 # float variable
name     = " runoob " # string

multiple variable assignments

Python allows you to assign values ​​to multiple variables at the same time.

a = b = c = 1
The above example creates an integer object with a value of 1, and the three variables are allocated to the same memory space.
or
a, b, c = 1, 2, "liubao"
In the above example, the two integer objects 1 and 2 are assigned to variables a and b, and the string object " runoob " is assigned to variable c.

Standard data types

There are six standard data types in Python 3:

• Number
• String (string)
• List
• Tuple (tuple)
• Sets
• Dictionary (dictionary)

Among the six standard data types of Python3:

• Immutable data (four): Number (number), String (string), Tuple (tuple), Sets (collection);
• Variable data (two): List (list), Dictionary (dictionary).

We mainly learn these six data types of python, which will be introduced in detail later