Python 03 Common operators

1. e notation, scientific counting method.

AeB A, B is an integer, a*10 the second party.

2. Logic operation, True 1, False is 0, it is best not to use this calculation

True (1) False (0)

true+true=2

3. Type conversion

integer int () floating-point number float () string str ()

>>> a=5.2
>>> A
5.2
>>> Int (a)
5
>>> Str (a)
' 5.2 '
>>> Float (a)
5.2

4. Type () determines the data type within the function

Isinstance (A,STR) The first is the data, the second is the data type, and the judgement is consistent

5. * */arithmetic operators

A + = 1 a-=1 a *=1 a/=1

A=b=c=d=1

>>> 10//8//integer except integers get integers (decimal, floor Division)
1
>>> 10/8
1.25
>>> 10.0/8
1.25

3 * * 2 = 9 3 2-Time Square

6. Priority level

-3 * * 2 =-9-(3**2)

Number of operations

PLUS sign

Arithmetic operator +-*///%

Comparison Operators > <

Logical operator not and OR

7. Logical operators

And both sides are true, true side (arbitrary) is false, false

or one side (any) is true, True and False, False

Not negation

Python 03 Common operators