How to define variables in python

In python, variables can be defined by assignment. You can use the equal sign (=) to assign a value to a variable. The naming of variables follows some rules:

• Variable names can only contain letters, numbers and underscores.
• Variable names cannot start with numbers.
• Variable names are case-sensitive. For example, name and Name are different variable names.
• The variable name cannot be a keyword of Python, such as if, for, etc.

The following are some examples of defining variables:

name = "John"# 字符串类型的变量
age = 25# 整数类型的变量
height = 1.75# 浮点数类型的变量
is_student = True# 布尔类型的变量

You can change the value of the variable at any time as needed, for example:

name = "Alice"
age = 30

In this way, the value of variable name becomes "Alice", and the value of variable age becomes 30.

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