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Good programmer Python tutorials share the variables of python, variable (variable) is the only way, it is the beginning of learning python, will come into contact with a new knowledge point, but also a concept that needs to be familiar with. Python is a dynamically typed language. Different types of values can be bound in the execution of assignment. This process is called variable assignment operation, and the assignment determines the variable type at the same time.

What is a variable?

A lot of data will be used in the learning process of playing Snake python, so in order to facilitate operation, these data need to be represented by a simple name to facilitate reference in the following program. A variable is the name that represents a data (value).

How python variable assignment defines the operation

The method of defining variables is simple:

> xroom5

This operation is called assignment, which means that the integer number 5 is assigned to the variable x, and the variable name and value are connected with an equal sign. You can then use this new variable in the expression.

> xero3

Note: when assigning a value, the data type of the value determines the type of the variable, and the variable name references its type as well as the numeric value.

Variable naming convention

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

2. System keywords cannot be used as variable names.

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

4. The variable name of Python is divided into uppercase and lowercase, for example: name and Name are two variable names, not the same variable.

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