Sample Analysis of variables and data types in python

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Variables and data types

Assignment does not need to specify a type, how to define variables

# define rule variable name = data adept 10 # python does not declare data types, so values must be assigned when defining variables

Av10 # python does not declare data types, so you must assign a value to a=20print (a) # use a to define the variable before it can be used, the variable can be changed # the value can be changed during program execution

The value can be changed directly without definition.

Enter the python terminal directly from pycharm

Realize numerical access through variables

Output element type

Print (type (a))

# Advanced type b = () # meta-ancestor type print (type (b)) c = [] # # list type print (type (c)) d = {} # # dictionary type print (type (d))

Naming rules for variables in Python

Name='liudehua' # cannot start with a number print (Name) _ age=89print (_ age)

Name='qianiqan' # case-sensitive print (name) # color changes can be considered that the keyword cannot be the variable name True=10print (True)

Naming convention

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