Arithmetic Operator | Operators in Python | Digital Community

Types of Operators in Python

Python provides us 7 popular types of operators:

· Arithmetic Operators

· Relational or Comparison Operators

· Logical Operators

· Assignment Operator

· Compound Operators

· Identity Operators

· Membership Operators

In this post, we are going to discuss Operators in Python but before these, if You are not seen our video on this topic please see it first, then you will understand the concepts very well.

First, we, discuss Arithmetic Operator:

• Arithmetic Operators

• Special points about + and *

• Difference between / and //

Operators are special symbols that carry out different kinds of computation on values.

For example 2+3

In the expression 2+3, + is an operator which performs addition of 2 and 3, which are called operands

o In Python, we have 7 arithmetic operators and they are as below:

(Arithmetic Addition)

(Subtraction)

(Arithmetic Multiplication)

(Float Division)

(Modulo Division)

(Floor Division)

(Power or Exponentiation)

o The Example of 5 Basic Arithmetic Operators :


   

  a=10


  b=4


  print("sum of",a,"and",b,"is",a+b)


  print("diff of",a,"and",b,"is",a-b)


  print("prod of",a,"and",b,"is",a*b)


  print("div of",a,"and",b,"is",a/b)


  print("rem of",a,“and",b,"is",a%b)

The Output :

o Two Special Operators // and ** :

The operator // in Python is called as floor division.

This means it returns the integer part and not the decimal part.

For example:

5//2 will be 2 not 2.5

o But there are 3 very important points to understand about this operator

o When used with positive numbers the result is only the integer part of the actual answer i.e. , the decimal part is truncated

o However if one of the operands is negative, the result is floored.

o If both the operands are integers, the result will also, be an integer, otherwise, the result will be float


   

  a=10


  b=4


  print(a//b)


  2



  a=10.0


  b=4


  print(a//b)



  2.0

If both the operands are integers, the result is also an integer. But if any of the operands is float the result is also float.

An Important Point

o There is another very important point to remember about the 3 operators /, // and %

o The point is that if the denominator in these operators is 0 or 0.0, then Python will throw the exception called ZeroDivisionError

a=10

b=0

print(a/b)

Output:

ZeroDivisionError



  a=10


  b=0.0


  print(a/b)


   

  Output:


  ZeroDivisionError

The power (**)Operator

The power operator i.e. ** performs exponential (power) calculation on operands.

For example:

a=10

b=3

print(a**b)

Output:

1000

Double Role Of The Operator +

o The operator + as discussed earlier also ,has 2 roles in Python

o When used with numbers , it performs addition and when used with strings it performs concatenation

For example:

a=10

b=5

print(a+b)

Output:

a=“Good”

b=“Evening”

print(a+b)

Output:

GoodEvening


  a=“Good”


  b=10


  print(a+b)


   


  Output:


  TypeError

Double Role of The Operator *

o The operator * also has 2 roles in Python

o When used with numbers, it performs multiplication and when used with one operand string and another operand int it performs repetition


  For example:


  a=10


  b=5


  print(a*b)


  50



  a="Digital"


  b=3


  print(a*b)


  DigitalDigitalDigital




  a=“Digital”


  b=“Community”


  print(a*b)


  Output:

  Type Error : Can’t multiply by non int