Simple Calculator

A simple calculator using python that can add, subtract, multiply or divide numbers depending upon the input from the user.

#This function adds the two numbers def add(x, y): return (x + y)

#This function subtracts the two numbers def subtract(x, y): return (x - y)

#This function multiplies the two numbers def multiply(x, y): return (x * y)

#This function divides the two numbers def divide(x, y): return (x / y)

print("Select your operation -> ") print("Enter 1 for addition (+)") print("Enter 2 for subtraction (-)") print("Enter 3 for multiplication (*)") print("Enter 4 for division (/)")

while True: #Get the input from the user choice = input("Enter your choice (1, 2, 3 or 4): ")

 #To check if the choice is one of the four options
 if choice in ('1', '2', '3', '4'):
     num1 = float(input("Please enter the first number: "))
     num2 = float(input("Please enter the second number: "))

     if choice == '1':
         print(num1, " + ", num2, " = ", add(num1, num2))

     elif choice == '2':
         print(num1, " - ", num2, " = ", subtract(num1, num2))

     elif choice == '3':
         print(num1, " * ", num2, " = ", multiply(num1, num2))

     elif choice == '4':
         print(num1, " / ", num2, " = ", divide(num1, num2))
     break #To exit the while True loop

 #Show error if the choice is not one of the four options
 else:
     print("Invalid Input!")