Python tutorial part 14 :- python Operators

Python Operators

 

Operators are particular symbols that are used to perform operations on operands. It returns result that can be used in application.

 

Example

1.    4 + 5 = 9  

 

Here 4 and 5 are Operands and (+) , (=) signs are the operators. This expression produces the output 9.

 

Types of Operators

Python supports the following operators

Arithmetic Operators.

Relational Operators.

Assignment Operators.

Logical Operators.

Membership Operators.

Identity Operators.

Bitwise Operators.

 

Arithmetic Operators

The following table contains the arithmetic operators that are used to perform arithmetic operations.

 

Operators

Description

//

Perform Floor division(gives integer value after division)

+

To perform addition

-

To perform subtraction

*

To perform multiplication

/

To perform division

%

To return remainder after division(Modulus)

**

Perform exponent(raise to power)

 

Example

>>> 10+20  

30  

>>> 20-10  

10  

>>> 10*2  

20  

>>> 10/2  

5  

>>> 10%3  

1  

>>> 2**3  

8  

>>> 10//3  

3  

>>>  

 

Relational Operators

The following table contains the relational operators that are used to check relations.

 

Operators

Description

< 

Less than

> 

Greater than

<=

Less than or equal to

>=

Greater than or equal to

==

Equal to

!=

Not equal to

<> 

Not equal to(similar to !=)

 

eg:

>>> 10<20  

True  

>>> 10>20  

False  

>>> 10<=10  

True  

>>> 20>=15  

True  

>>> 5==6  

False  

>>> 5!=6  

True  

>>> 10<>2  

True  

>>>  

 

Assignment Operators

The following table contains the assignment operators that are used to assign values to the variables.

 

Operators

Description

=

Assignment

/=

Divide and Assign

+=

Add and assign

-=

Subtract and Assign

*=

Multiply and assign

%=

Modulus and assign

**=

Exponent and assign

//=

Floor division and assign

 

Example

1.    >>> c=10  

2.    >>> c  

3.    10  

4.    >>> c+=5  

5.    >>> c  

6.    15  

7.    >>> c-=5  

8.    >>> c  

9.    10  

10. >>> c*=2  

11. >>> c  

12. 20  

13. >>> c/=2  

14. >>> c  

15. 10  

16. >>> c%=3  

17. >>> c  

18. 1  

19. >>> c=5  

20. >>> c**=2  

21. >>> c  

22. 25  

23. >>> c//=2  

24. >>> c  

25. 12  

26. >>>  

 

Logical Operators

The following table contains the arithmetic operators that are used to perform arithmetic operations.

 

Operators

Description

and

Logical AND(When both conditions are true output will be true)

or

Logical OR (If any one condition is true output will be true)

not

Logical NOT(Compliment the condition i.e., reverse)

 

Example

a=5>4 and 3>2  

print a  

b=5>4 or 3<2  

print b  

c=not(5>4)  

print c  

Output:

1.    >>>   

2.    True  

3.    True  

4.    False  

5.    >>>  

 

Membership Operators

The following table contains the membership operators.

 

Operators

Description

in

Returns true if a variable is in sequence of another variable, else false.

not in

Returns true if a variable is not in sequence of another variable, else false.

 

Example

a=10  

b=20  

list=[10,20,30,40,50];  

if (a in list):  

    print "a is in given list"  

else:  

    print "a is not in given list"  

if(b not in list):  

    print "b is not given in list"  

else:  

    print "b is given in list"  

Output:

>>>   

a is in given list  

b is given in list  

>>>  

 

Identity Operators

The following table contains the identity operators.

 

Operators

Description

is

Returns true if identity of two operands are same, else false

is not

Returns true if identity of two operands are not same, else false.

 

Example

a=20  

b=20  

if( a is b):  

    print  a,b have same identity  

else:  

    print a, b are different  

b=10  

if( a is not b):  

    print  a,b have different identity  

else:  

    print a,b have same identity  

Output

>>>   

a,b have same identity  

a,b have different identity  

>>>