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Basic Operators

Operators are the constructs which can manipulate the value of operands. Python has the following operators

Assume a = 10, b = 20.

Arithmetic operators

Operator	Description	example
+ Addition	adds values on either sides of the operator	a + b = 30
- Subtraction	subtracts right hand operand from left hand operand	b - a = 10
* Multiplication	multiplies values on either side of operator	a * b = 200
/ Division	divides left hand operand from right hand operand	a / b = 0.5
% Modulus	divides left hand operand from right hand operand and returns remainder	a % b = 10
** Exponent	performs and exponential(power) calculation on operands	a ** b = 100000000000000000000
// Floor division	The division of operands where the result is the quotient in which the digits after the decimal point are removed. But if one of the operands is negative, the result is floored, i.e., rounded away from zero (towards negative infinity)	b // a = 2

Operator	Description	example
==	if the value of operands are equal, then the condition becomes true.	(a == b) is not true
!=	if the values of the operands are not equal, then the condition becomes true	(a != b) is true
>	If the value of left operand is greater than the value of right operand, then condition becomes true.	a > b is False
<	If the value of left operand is less than the value of right operand, then condition becomes true.	a < b is True
>=	If the value of left operand is greater than or equal to the value of right operand, then condition becomes true.	a >= b is False
<=	If the value of left operand is less than or equal to the value of right operand, then condition becomes true.	a <= b is True

Operator	Description	example
+ ADD	Assigns values from right side operands to left side operand	c = a + b assigns value of a + b into c
+= ADD AND	It adds right operand to the left operand and assign the result to left operand	c += a is equivalent to c = c + a
-= Subtract AND	It subtracts right operand from the left operand and assign the result to left operand	c -= a is equivalent to c = c - a
*= Multiply AND	It multiplies right operand with the left operand and assign the result to left operand	c = a is equivalent to c = c a
/= Divide AND	It divides left operand with the right operand and assign the result to left operand	c /= a is equivalent to c = c / ac /= a is equivalent to c = c / a
%= Modulus AND	It takes modulus using two operands and assign the result to left operand	c %= a is equivalent to c = c % a
**= Exponential AND	Performs exponential (power) calculation on operators and assign value to the left operand	c = a is equivalent to c = c a
//= FLoor division	It performs floor division on operators and assign value to the left operand	c //= a is equivalent to c = c // a

Python’s membership operators test for membership in a sequence, such as strings, lists, or tuples.

Operator	Description	example
in	Evaluates to true if it finds a variable in the specified sequence and false otherwise.	x in y, here in results in a 1 if x is a member of sequence y.
not in	Evaluates to true if it does not finds a variable in the specified sequence and false otherwise.	x not in y, here not in results in a 1 if x is not a member of sequence y.

Identity operators compare the memory locations of two objects

Operator	Description	example
is	Evaluates to true if the variables on either side of the operator point to the same object and false otherwise.	a is b returns false
is not	Evaluates to false if the variables on either side of the operator point to the same object and true otherwise.	a is not b returns ture