Basic Operators in Python

Operators  in Python

     ·       Arithmetic operators

     ·       Relational operators

     ·       Logical operators

     ·       Bitwise operators

     ·       Assignment  operators

     ·       Special operators

Arithmetic operators:

Arithmetic operators are used to perform mathematical operations like addition, subtraction, multiplication and division.

Example:

x = 10

y = 4

# Addition of numbers

add = x + y

# Subtraction of numbers

sub = x - y

# Multiplication of number

mul = x * y

# Division(float) of number

div1 = x / y

# Division(floor) of number

div2 = x // y

# Modulo of both number

mod = x % y

# print results

print(add)

print(sub)

print(mul)

print(div1)

print(div2)

print(mod)

output:

14

6

40

2.5

2

2

Relational Operators

It compares the values. It either returns True or False according to the given condition.

Example:

a = 55

b = 33

# a > b is True

print(a > b)

# a < b is false

print(a < b)

# a == b is False

print(a == b) 

# a != b is True

print(a != b)

# a >= b is True

print(a >= b)

# a <= b is false

print(a <= b)

Output:

True

False

False

True

True

False

Logical operators:

Logical operators perform Logical AND, Logical OR and Logical NOT operations.

Example:

a = True #Operands

b = False #Operands

# Print a and b is False

#Logical And True if both operands (a and b) are true

print(a and b)

# Print a or b is True

# Logical OR True if either the operands are true

print(a or b)

# Print not a is False

#Logical Not True if operand is false

print(not a)

Output:

False

True

False

Bitwise Operator:

 Bitwise operators acts on bits and performs bit by bit operation.

Example:

a = 100

b = 4

# Print bitwise AND operation

print(a & b)

# Print bitwise OR operation

print(a | b)

# Print bitwise NOT operation

print(~a)

# print bitwise XOR operation

print(a ^ b)

# print bitwise right shift operation

print(a >> 2)

# print bitwise left shift operation

print(a << 2)

Output:

4

100

-101

96

25

400

 Assignment operators:

 Assignment operators are used to assign values to the variables.

Example:

a = 21

b = 10

c = 0

c = a + b

print ("Line 1 - Value of c is ", c)

c += a

print ("Line 2 - Value of c is ", c)

c *= a

print ("Line 3 - Value of c is ", c)

c /= a

print ("Line 4 - Value of c is ", c)

c  = 2

c %= a

print ("Line 5 - Value of c is ", c)

c **= a

print ("Line 6 - Value of c is ", c)

c //= a

print ("Line 7 - Value of c is ", c)

output:

Line 1 - Value of c is  31

Line 2 - Value of c is  52

Line 3 - Value of c is  1092

Line 4 - Value of c is  52.0

Line 5 - Value of c is  2

Line 6 - Value of c is  2097152

Line 7 - Value of c is  99864

Special Operators:

There are some special type of operators like

    ·       Membership Operators:

    in and not in are the membership operators; used to test whether a value or variable is in a sequence.

in            True if value is found in the sequence

not in        True if value is not found in the sequence

Example:

# Examples of Membership operator

x = 'earth is round'

y = {3:'a',4:'b'}

print('G' in x)

print('earth' not in x)

print('Earth' not in x)

print(3 in y)

print('b' in y)

Output:

False

False

True

True

False