Python basic operations

Environment: python3.x

A, B = 60,164

One, arithmetic operators

Operator	Describe	Example
+	Addition	A+b = 224
-	Subtraction	A-B =-104
*	Multiplication	A*b = 9840
/	Except (keep decimal digits)	60/2 = 30.0
//	Divisible	60//2 = 30
%	Seeking redundancy	B%a = 44
**	Powers	a**2 = 3600

Second, comparison operator (returns TRUE or false)

Operator	Describe	Example
==	Determine if values are equal on both sides	A = = B False
！ =	Determine if values are not equal on both sides	A! = B True
>	Determine if the left value is greater than the right	A > B False
<	Determine if the left value is less than the right	A < b True
>=	Determine if the left value is greater than or equal to the right	A >= b False
<=	Determine if the left value is less than or equal to the right	A < b True

Three, assignment operators

Operator	Describe	Example
=	Assign value	c = 30
+=	Add and assign values	c+=10 equivalent to C=c+10
-=	Subtract and assign values	c-=10 equivalent to C=c-10
*=	Multiply and assign values	c*=10 equivalent to C=c*10
/=	Divide and assign values	c/=10 equivalent to C=c/10
//=	Divide and assign values	c//=10 equivalent to C=c//10
%=	Finding the remainder and assigning values	c%=10 equivalent to C=c%10
**=	exponentiation and assign values	C**=3 equivalent to c = = C**3

Four, bitwise operators

A =   #0011 1100
b = 164  #1010 0100

Operator	Describe	Example
&	Bitwise AND: Only true when True (1)	A&b 0010 0100
|	Bitwise OR: Only false when the same is False (0)	A|b 1011 1100
^	Bitwise XOR: Same as 0, opposite 1	A^b 1001 1000
<<	Bitwise left shift n bit : 2 n sub-square	A << 1 0111
>>	Bitwise RIGHT SHIFT n bit : 2 n sub-square	A >> 2 1111
~	Bitwise inverse:	The negative number is in the complement, such as this column: ~a for 1111 1111 1111 1111 1111 1111 1100 0011( on the machine) to get the complement, anti-code:1111 ... 1100 0010(complement -1), the original code (anti-code inversion):1000...0011 1101 (The first bit is the sign bit) Get the result -61

Five, logical operators

Operator	Describe	Example
and	Logic and	A and B are true output b(the last value), false output False value
Or	Logical OR	A or B is true output truth, false output b(i.e. the last value)
Not	Logical Non-	Not a False

VI. member Operators

Inch
Not in
Such as
list = [' A ', ' B ']
' A ' in list = True #判断是否为该list成员, relative to

Vii. Identity Arithmetic

Is

Not is

Such as

A = 1
b = A
B is a = "True #is判断两个标识符是不是指向同一对象, corresponds to not" is

Eight or three-dollar operation

result = value 1 if condition else value two

such as: A,b,c = 1,3,5
D=a if a>b else C #如果a >b d=a, otherwise d=c,
Print (d)
D=a if a<b else C # #如果a <b is d=a, otherwise d=c
Print (d)

Python basic operations