Python Operators - A Quick Reference

Python operators can be classified into several categories.

• Assignment Operators
• Arithmetic Operators
• Logical Operators
• Comparison Operators
• Bitwise Operators

Assignment operators include the basic assignment operator equal to sign (=).

But to simplify code, and reduce redundancy, Python also includes arithmetic assignment operators.

This includes the += operator in Python used for addition assignment, //= floor division assignment operator, and others.

Here’s a list of all the arithmetic assignment operators in Python.

Using assignment operators

# take two variable, assign values with assignment operators
a=3
b=4
print("a: "+str(a))
print("b: "+str(b))
# it is equivalent to a=a+b
a+=b
print("a: "+str(a))
print("b: "+str(b))
# it is equivalent to a=a*b
a*=b
print("a: "+str(a))
print("b: "+str(b))
# it is equivalent to a=a/b
a/=b
print("a: "+str(a))
print("b: "+str(b))
# it is equivalent to a=a%b
a%=b
print("a: "+str(a))
print("b: "+str(b))
# it is equivalent to a=a**b ( exponent operator)
a**=b
print("a: "+str(a))
print("b: "+str(b))
# it is equivalent to a=a//b ( floor division)
a//=b
print("a: "+str(a))
print("b: "+str(b))

#create two variables
a=100
b=200
# addition (+) operator
print(a+b) 
# subtraction (-) operator
print(a-b) 
# multiplication (*) operator
print(a*b)
# division (/) operator
print(b/a)
# modulus (%) operator
print(a%b) # prints the remainder of a/b
# exponent (**) operator
print(a**b) #prints a^b

Output:

# create two variables
a=100
b=200
# (==) operator, checks if two operands are equal or not
print(a==b)
# (!=) operator, checks if two operands are not equal
print(a!=b)
# (>) operator, checks left operand is greater than right operand or not
print(a>b)
# (<) operator, checks left operand is less than right operand or not
print(a<b)
#(>=) operator, checks left operand is greater than or equal to right operand or not
print(a>=b)
# (<=) operator, checks left operand is less than or equal to right operand or not
print(a<=b)

#create two variables
a=10 # binary 1010
b=7  # binary 0111
# Binary AND (&) operator, done binary AND operation
print(a&b)
# Binary OR (|) operator, done binary OR operation
print(a|b)
# Binary XOR (^) operator, done binary XOR operation
print(a^b)
# Binary ONEs Compliment (~) operator, done binary One's Compliment operation
print(~a)
# Binary Left Shift (<<) operator, done binary Left Shift operation
print(a<<1) 
# Binary Right Shift (>>) operator, done binary Right Shift operation
print(a>>1)

#take user input as int
a=int(input())
# logical AND operation
if a%4==0 and a%3==0:
    print("divided by both 4 and 3")
# logical OR operation
if a%4==0 or a%3==0:
    print("either divided by 4 or 3")
# logical NOT operation
if not(a%4==0 or a%3==0):
    print("neither divided by 4 nor 3")

Precedence of these operators means the priority level of operators. This becomes vital when an expression has multiple operators in it. For example consider the following expression:

>>> 2+3*4

Now, what do you think the series of operation would be? We can add 2 and 3, then multiply the result by 4. Also, we can multiply 3 and 4 first, then add 2 with it. Here we can see that the operators’ precedence is important.

Below is a list of operators indicating the precedence level. It’s in descending order. That means the upper group has more precedence than that of the lower group.

1. Parenthesis – ()
2. Exponentiation – **
3. Compliment, unary plus and minus – ~, +, -
4. Multiply, Divide, modulo – *, /, %
5. Addition and Subtraction – +, -
6. Right and Left Shift – >>, <<
7. Bitwise AND – &
8. Bitwise OR and XOR – |, ^
9. Comparison Operators – ==, !=, >, <, >=, <=
10. Assignment Operator- =