Getting Started with Python

2. Python positioning
4. Variable
6. User-to-program interaction
8. Basic data types
10. Formatted output
12. Basic operators
14. if...else of Process Control
16. Process Control while loop
18. Process Control for loop
20. Extended Reading
22. Homework

Python positioning:

# High-level language: Standing in the Human (slave) angle, speaking, that is, using human characters to write programs, shielding the operation of the hardware.  # explanatory type (interpreter required, equivalent to simultaneous interpretation): such as python, slow execution, easy debugging. 

Variable:

How to define variables:

# variable name (equivalent to house number, the space to which the value is located), equal sign, variable value name='guoxq'age =18

Definition Specification for variables:

# 1. Variable names can only be any combination of letters, numbers, or underscores #2. The first character of a variable name cannot be a number #3. The keyword cannot be declared as a variable name [' and ', ' as ', '  Assert ', ' Break ', ' class ', ' Continue ', ' Def ', ' del ', ' elif ', ' Else ', ' except ', ' exec ', ' finally ', ' for ', ' from ', ' global ', ' If ', ' import ', ' in ', ' was ', ' lambda ', ' not ', ' or ', ' pass ', ' print ', ' raise ', ' return ', ' Try ', ' and ', ' with ', ' yield ']
    

How to define:

# underline (recommended)AGE_OF_GUOXQ =80

Defined variables are: id,type,value

#the 1 equals sign compares value,#2 is the ID of the comparison#emphasize:#1. Same ID, meaning the type and value must be the same#2. Value the same type must be the same, but the ID may be different, as follows>>> x='Info guoxq:18'>>> y='Info guoxq:18'>>>ID (x)4376607152>>>ID (y)4376607408>>> >>> x = =ytrue>>> x isYfalse

Getting Started with Python