Python Basic 02 Base data type

Simple data types and assignments

Variables do not need to be declared

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

>>> A = 10

Then your memory has a variable a, its value is 10, and its type is an integer (integer). You don't have to make any special statements until then,

The data type is automatically determined by Python.

>>>print (a)

>>>print (Type (a))

Then there will be the following output:

10

<class ' int ' >

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

Reclaim variable names

If you want a to store different data, you do not need to delete the original variable can be directly assigned value.

>>>a = 1.3

>>>print (A,type (a))

will have the following output

1.3<class ' float ' >

We see another use of print, that is, printh followed by multiple outputs, separated by commas.

Basic data types

a=10 # int Shaping

a=1.3 # float Floating point

A=true # Truth (true/false)

A= ' hello! ' #字符串 string can also be enclosed in double quotation marks

The above is the most commonly used data types, in addition to fractions, characters, complex numbers and other types, interested can learn.

Summarize

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

Type (): Query data type

integers, floating-point numbers, Boolean values, strings

Python Basic 02 Base data type