Python: Basic syntax: Data types & Variables & Constants

Data type

Integer, Decimal, string, bool, NULL

# integer 10#  decimal 3.141.0#  string 'hello,world'  "hello,world"#  booltruefalse# Null value None

Variable

Variables in Python are just a "label" to the data, just a "code name", a value can have multiple symbols, that is, multiple variable names can point to the same data.

Naming rules: 1, can only be composed of letters, numbers, underscores; 2. Cannot start with a number

' Jack '  = 11

Constant

Python: Basic syntax: Data types & Variables & Constants