Operators in Python (1)

Lesson#12

Arithmetic Operators

Arithmetic operators are used to perform common mathematical operations.

Python has the following arithmetic operators:

Addition: +

Subtraction: -

Multiplication: *

Division: /

Modulus: %

Exponentiation: **

Floor Division: //

Examples:

x = 10
y = 3

print(x + y)    # 13
print(x-y)      # 7
print(x*y)      # 30
print(x/y)      # 3.33333
print(x%y)      # 1
print(x**2)     # 100
print(x//2)     # 5

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Bitwise operators

Bitwise operators are used to compare binary numbers. List of bitwise operators is given below:

& : AND

| : OR

^ : XOR

~ : Not

<< : Zero fill left shift

>> : Zero fill right shift

Examples:

x = 10
y = 3

print(x & y)   # 2
print(x | y)   # 11
print(x ^ y)   # 9
print(~x)      # -11
print(x >> 1)  # 5
print(x << 1)  # 20

Compound Assignment Operators

Compound assignment operator is a combination of assignment and arithmetic or unary operator.

x = 5
x = x + 2

# The statement x = x + 2 can be re-written using 
# compound assignment operator as:
x += 2

List of compound assignment operators is as follows:

+=

-=

*=

%=

/=

//=

**=

&=

|=

^=

>> =

<< =