Introduction to basic data types and variable declarations in the basic python tutorial

This article mainly introduces the basic data types and variable declaration in the basic python tutorial. it first introduces some knowledge about variable declaration and then lists the most common basic data types, for more information, see Variable does not need to be declared

Python variables do not need to be declared. you can enter them directly:

The code is as follows:

>>> A = 10

Then there is a variable a in your memory. its value is 10 and its type is integer ). Before that, you do not need to make any special declaration, but the data type is automatically determined by Python.

The code is as follows:

>>> Print

>>> Print type ()

The following output is displayed:

The code is as follows:

10

Here, we learned a built-in function type () to query the type of a variable.

Reclaim variable name

If you want a to store different data, you can directly assign values without deleting the original variables.

The code is as follows:

>>> A = 1.3

>>> Print a, type ()

The following output is displayed:

The code is as follows:

1.3

We can see another usage of print, that is, print is followed by multiple outputs, separated by commas.

Basic data type

The code is as follows:

A = 10 # int integer

A = 1.3 # float floating point number

A = True # True Value (True/False)

A = 'Hello! '# String

The above is the most common data type. double quotation marks can also be used for strings.

(In addition, there are scores, characters, plural numbers, and other data types. if you are interested, you can learn)

Summary

Variables do not need to be declared or deleted. they can be recycled directly.

Type (): query data type

Integer, floating point, True Value, string