Lesson 18: Build Your Own Python Calculator

first = input("enter your first number : ")

operator = input("enter operator(+,-,*,/,%,**) : ")

second = input("enter your second number : ")

first = int(first)

second = int(second)

if operator == "+":

print( first + second)

elif operator == "-":

print( first - second)

elif operator == "*":

print( first * second)

elif operator == "/":

print( first / second)

elif operator == "%":

print( first % second)

elif operator == "**":

print(first ** second)

else :

print("invalid operation")

Learn how to create a simple calculator?

Using Python coding that can add, subtract, multiply or divide depending upon the input from the user.

About this Code

User choose the desired operation.

Options 1, 2, 3, 4, 5, 6 are valid.

If user chooses any operator other than the above six valid operators it is shown as("invalid operation").

Two numbers are taken if…elif…else branching is used to execute a particular section.

1. + Addition

2. - Subtraction

3. * Multiplication

4. / Division

5. % Modulus

6. ** Exponentiation(print(2**5)

#same as 2*2*2*2*2)