Python variables (Assignment, data type, data type conversion)

There are three ways to assign a Python variable;

1. Direct assignment: Age = 28

2. Multiple variable assignment age, sex = 1 #每个变量都必须要有个对应的值

3. Special form Assignment A = b = 28

Note that variables must be assigned before they are used, which differs from C + + because there is no type modifier in front of the python variable, and storage space cannot be allocated;

Variable names cannot be named by keywords; they can only be named by letters, numbers, and underscores, not by numbers, with an underscore, or as a variable name

Variable names are case-sensitive

Digression: Why use a variable name, there are 2 benefits:

1. Easy maintenance;

2. Save space for documents;

Two. Data type

Python variables (Assignment, data type, data type conversion)