• Operator is a symbol that performs certain operations.
• Python provides the following set of operators;
  •  Arithmetic Operators
  • Relational Operators or Comparison Operators
  • Logical operators
  • Bitwise operators
  • Assignment operators
  • Special operators

Arithmetic Operators

• + ⇒ Addition
• – ⇒ Subtraction
• * ⇒ Multiplication
• / ⇒ Division operator
• % ⇒ Modulo operator
• // ⇒ Floor Division operator
• ** ⇒ Exponent operator or power operator

Example

num1 = 10
num2 = 2

print('num1+num2 =', num1+num2)
print('num1-num2 =', num1-num2)
print('num1*num2 =', num1*num2)
print('num1/num2 =', num1/num2)
print('num1//num2 =', num1//num2)
print('num1%num2 =', num1%num2)
print('num1**num2 =', num1**num2)

Output

num1+num2 = 12
num1-num2 = 8
num1*num2 = 20
num1/num2 = 5.0
num1//num2 = 5
num1%num2 = 0
num1**num2 = 100

num1 = 10.5
num2 = 2

print('num1+num2 =', num1+num2)
print('num1-num2 =', num1-num2)
print('num1*num2 =', num1*num2)
print('num1/num2 =', num1/num2)
print('num1//num2 =', num1//num2)
print('num1%num2 =', num1%num2)
print('num1**num2 =', num1**num2)

Output

num1+num2 = 12.5
num1-num2 = 8.5
num1*num2 = 21.0
num1/num2 = 5.25
num1//num2 = 5.0
num1%num2 = 0.5
num1**num2 = 110.25

Remark

• / operator always performs floating point arithmetic. Hence it will always returns float value.
• Floor division (//) can perform both floating point and integral arithmetic. If arguments are int type then result is int type. If at least one argument is float type then result is float type.
• We can use + and * operators for str type also.
  • + ⇒ String Concatenation Operator
  • * ⇒ String Multiplication Operator
• If we want to use + operator for str type then compulsory both arguments should be str type only otherwise we will get error.

Example

str1 = "ajay"
print(str1 + 10)

Output

TypeError: can only concatenate str (not "int") to str

• If we use * operator for str type then compulsory one argument should be int and other argument should be str type.

str1 = "ajay"
print(str1*2)
print(2*str1)
print(2.5*str1)
print(str1*"ajay")

Output

ajayajay
ajayajay
TypeError: can't multiply sequence by non-int of type 'float'
TypeError: can't multiply sequence by non-int of type 'str'

Remark

• For any number x, x/0 and x%0 always raises “ZeroDivisionError”. Example 10/0, 10.0/0 … etc.

Ungraded Questions

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