当前位置：网站首页>06 - data type

06 - data type

2022-04-22 05:57:00 【ʕ·͡ˑ· ཻ ʔ**ʕ·͡ˑ· ཻ ʔ】

Catalog

One 、 Why data types are needed

Two 、 Data type classification

3、 ... and 、 View data types of variables

Four 、 Data type conversion

5、 ... and 、 Run interactively Python Code

One 、 Why data types are needed

People can easily distinguish different types of data with the naked eye , But computers can't .
The process of computer work is to complete different types of calculations , For example, mathematical operations , Do file storage , Make logical judgments, etc .
Data types can classify, manage and identify different data .

Two 、 Data type classification

3、 ... and 、 View data types of variables

grammar ：type( data or Variable name )

Be careful ： The function itself has no output function , Need to cooperate with print() Function USES ！

Four 、 Data type conversion

1. Type conversion ： Convert one data type to another .

int()：

float The type can be changed to int type ;

Only integers of string type can be converted to int type ;

float()：

int Type can be converted to float type ;

Numeric （ Integers 、 Boolean ） Can be converted into float type ;

str()：

Convert any other type to string type You can also use quotation marks ;

2. Conversion mode ： New variable name = Type to convert to （ Original variable name ）

Be careful ： Data type conversion , The data type of the original variable will not be changed , Is to generate a new variable to store the original variable data that changes the data type .