Python basics 1 and python Basics

Python basics 1 and python Basics

Variable: Information stored, called, modified, or operated in the future

Constant: Fixed amount, all uppercase letters

Naming rules:

Note:

#: Comment on a single line

"Or ''': multi-line comment

Get user input: Input ("")

Strong conversion:Str (integer type) # convert Integer type to string type

Int (string accepted) # convert string type to integer type

Arithmetic Operator:

+ -*/! // (Take the entire division) %

Comparison Operators: Each comparison is actually a condition judgment, and a True or False value is obtained accordingly.

<,>, <=, >=, = ,! =

Assignment operator:

=, + =,-=, * =, % =, // =, ** =

Logical operators:Logical operators are used for logical computing. They are expressions or variables used for conditional judgment.

Not: If the expression is True, the returned result is False. Otherwise, the returned result is True.

And: returns True if both expressions are True. If one expression is False, return false.

Or: If either expression is True, the return result is True.

Expression:An expression is a code or statement consisting of operands and operators. An expression can be evaluated and placed on the right of "=" to assign values to variables.