How to create variables in python

Variable is a new knowledge point that you will come into contact with when you first learn python, and it is also a concept that needs to be familiar with. Python is a dynamically typed language. Different types of values ​​can be bound during the execution of assignment. This process is called variable assignment operation. The assignment also determines the variable type.

A lot of data will be used in the python learning process. In order to facilitate the operation, these data need to be represented by a simple name to facilitate the subsequent program. Quote. A variable is a name that represents a certain data (value).

The variable definition method is very simple:

>>> x = 5

This operation process is assignment, which means assigning the integer number 5 to the variable x, using the equal sign to connect the variable name and value. You can then use this new variable in expressions.

>>> x * 3
15

Note: When assigning a value, the data type of the value determines the type of the variable. The variable name references the value and also references its type.

Variable naming rules

1. Variable names can include letters, numbers, and underscores, but numbers cannot be the beginning. For example: name1 is a legal variable name, but 1name is not.

2. System keywords cannot be used as variable names

3. Except for underscores, other symbols cannot be used as variable names

4. Python’s variable names are Except for case-sensitive, for example: name and Name are two variable names, not the same variable.

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