Pyhton :Operators

Python Operators:
Operators are the symbols which perform the operation on the some values. These values are known as operands. Python have following operators –

Arithmetic Operators
Relational Operators
Assignment Operators
Logical Operators
Membership Operators
Identity Operators
Bitwise Operators
Arithmetic Operators:

Operator	Name	Example	Result
+	Addition	x+y	Sum of x and y.
-	Subtraction	x-y	Difference of x and y.
*	Multiplication	x*y	Product of x and y.
/	Division	x/y	Quotient of x and y.
%	Modulus	x%y	Remainder of x divided by y.
**	Exponent	x**y	x**y will give x to the power y
//	Floor Division	x/ y	The division of operands where the result is the quotient in which the digits after the decimal point are removed.

Relational Operators :  It is also known as comparison operator because it compares the values. After comparison it returns the Boolean value i.e. either true or false.

Operator	Name	Example	Result
==	Equal	x==y	True if x is exactly equal to y.
!=	Not equal	x!=y	True if x is exactly not equal to y.
>	Greater than	x>y	True if x (left-hand argument) is greater than y (right-hand argument).
<	Less than	x<y	True if x (left-hand argument) is less than y (right-hand argument).
>=	Greater than or equal to	x>=y	True if x (left-hand argument) is greater than or equal to y (left-hand argument).
<=	Less than or equal to	x<=y	True if x (left-hand argument) is less than or equal to y (right-hand argument).

Assignment Operators:

Operator	Shorthand	Expression	Description
+=	x+=y	x = x + y	Adds 2 numbers and assigns the result to left operand.
-=	x-= y	x = x -y	Subtracts 2 numbers and assigns the result to left operand.
*=	x*= y	x = x*y	Multiplies 2 numbers and assigns the result to left operand.
/=	x/= y	x = x/y	Divides 2 numbers and assigns the result to left operand.
%=	x%= y	x = x%y	Computes the modulus of 2 numbers and assigns the result to left operand.
**=	x**=y	x = x**y	Performs exponential (power) calculation on operators and assign value to the equivalent to left operand.
//=	x//=y	x = x//y	Performs floor division on operators and assign value to the left operand

Logical Operators:

Operator	Example	Result
and	(x and y)	is True if both x and y are true.
or	(x or y)	is True if either x or y is true.
not	(x not y)	If a condition is true then Logical not operator will make false.

Membership Operators:

Operator	Description	Example
in	It returns true if it finds a variable in the sequence otherwise returns false	List = [1,2,3,4,5,6,7,8];i=1;If(i in List):print (‘i is available in list’)Else print (‘i is not available in list’)Output – i is available in list
not in	It returns true if it does not find a variable in the sequence otherwise returns false	List = [1,2,3,4,5,6,7,8];j=10;If(j not in List):print (‘j is not available in list’)Else print (‘j is available in list’)Output – j is not available in list

Identity Operators:

These operators are used to compare the memory address of two objects.

Operator	Description	Example
is	It returns true if both operand ‘s identity is same otherwise false	I = 20J = 20If(I is J):print ‘I and J have same identity’Elserint ‘I and J have not same identity’Output – I and J have same identity
is not	It returns true if both operand ‘s identity is not same otherwise false	I = 20J = 230If(I is not J):print (‘I and J have not same identity’)Else print (‘I and J have same identity’)Output – I and J have not same identity

Bitwise Operators:

Operator	Shorthand	Expression	Description
&	And	x & y	Bits that are set in both x and y are set.
|	Or	x | y	Bits that are set in either x or y are set.
^	Xor	x ^ y	Bits that are set in x or y but not both are set.
~	Not	~x	Bits that are set in x are not set, and vice versa.
<<	Shift left	x <<y	Shift the bits of x, y steps to the left
>>	Shift right	x >>y	Shift the bits of x, y steps to the right.

Operator Precedence:

Highest precedence at top, lowest at bottom.

Operator	Description
( )	Parentheses
x[index],x[index1:index2],f(arg...),x.attribute	Subscription, slicing, call, attribute reference
**	Exponentiation
+x, -x, ~x	Positive, negative, bitwise NOT
*, /, %	Multiplication, division, remainder
+, -	Addition and subtraction
<<, >>	Shifts
&	Bitwise AND
^	Bitwise XOR
|	Bitwise OR
in, not in, is, is not, <, <=, >, >=, !=, ==	Comparisons, including membership tests and identity tests
not x	Boolean NOT
and	Boolean AND
or	Boolean OR
if - else	Conditional expression
lambda	Lambda expression

Operators which all have same precedence and chain evaluates from left to right except for comparisons and exponentiation. Comparisons can be chained arbitrarily.