Python Operators

  • An operator is a symbol or a character in programming which takes two operands to perform an action or a computation.
  • For example, in the expression "4 + 5" , "+" is an operator It will perform sum of numbers "4" and "5" and returns result "9".

Types of operators in python

  • Arithmetic Operators
  • Comparison Operators
  • Assignment Operators
  • Logical Operators
  • Bitwise Operators
  • Membership Operators
  • Identity Operators

Arithmetic Operators

  • consider the values a = 10 and b = 21
Operator Description Example Output
> Greater than print(b > a) True
< Less than print(b < a) False
>= Greater than or equal print(b >= a) True
<= Less than or equal print(b <= a) False

Comparison Operators

  • consider the values a = 10 and b = 20.
  • comparison operators always returns a boolean value either True or False
Operator Description Example Output
> Greater than print(b > a) True
< Less than print(b < a) False
>= Greater than or equal print(b >= a) True
<= Less than or equal print(b <= a) False

Assignment Operators

  • Consider the value of b = 20
Operator Description Example
= Assigns the value a = 100
+= Performs addition & assignment b += 23  equivalent to  b = b + 23
-= Performs subtraction & assignment b -= 13  equivalent to  b = b - 13
*= Performs multiplication & assignment b *= 3  equivalent to  b = b * 3
/= Performs division & assignment b /= 13  equivalent to  b = b / 13
%= Performs modulus operation & assign b %= 3  equivalent to  b = b % 3
//= Performs floor div & assignment b //= 13  equivalent to  b = b // 13
**= Performs exp calculation & assignment b **= 3  equivalent to  b = b ** 3

Logical Operators

Operator Description Example
and Returns boolean value if given conditions are true ⇒ True Otherwise ⇒ False a = 100 a > 90 and a < 110  ⇒ True a > 90 and a > 110  ⇒ False
or Returns boolean value At least one of the given conditions are true ⇒ True Otherwise ⇒ False a = 100 a > 190 and a < 110  ⇒ True a > 190 and a > 110  ⇒ True
not It inverts the boolean value not True ⇒ False not False ⇒ True

Bitwise Operators

Operator Description
& Operator copies a bit to the result if it exists in both operands
| It copies a bit if it exists in either operand.
^ It copies the bit if it is set in one operand but not both.
~ It is unary and has the effect of 'flipping' bits.
>> The left operands value is moved left by the number of bits specified by the right operand.
<< The left operands value is moved right by the number of bits specified by the right operand.

Membership Operators

Operator Description Example
in Returns boolean value if it finds the var in given sequence returns true a = 10 a in [1, 2, 10, 20] ⇒ True a in [1, 2, 110, 20] ⇒ False
not in Returns boolean value a = 10 a not in [1, 2, 10, 20] ⇒ False a not in [1, 2, 110, 20] ⇒ True

Identity Operators

Operator Description Example
is Returns boolean value True if both variables points to the same memory location in the RAM a = 100; b = 100; c = 101; a is b ⇒ True a is c ⇒ False
Is not Returns boolean value a = 100 b = 100 c = 101 a is not b ⇒ False a is not c ⇒ True

Note: Try to remember all operators. we will use it very frequently.