Question

Write a program to take input of two numbers and make a calculator based on user choice

Answer 1

Answer:

# Program make a simple calculator

# This function adds two numbers

def add(x, y):

   return x + y

# This function subtracts two numbers

def subtract(x, y):

   return x - y

# This function multiplies two numbers

def multiply(x, y):

   return x * y

# This function divides two numbers

def divide(x, y):

   return x / y

print("Select operation.")

print("1.Add")

print("2.Subtract")

print("3.Multiply")

print("4.Divide")

while True:

   # Take input from the user

   choice = input("Enter choice(1/2/3/4): ")

   # Check if choice is one of the four options

   if choice in ('1', '2', '3', '4'):

       num1 = float(input("Enter first number: "))

       num2 = float(input("Enter 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

   else:

       print("Invalid Input")

Answer 2

Answer:

In this program, we ask the user to choose an operation. Options 1, 2, 3, and 4 are valid. If any other input is given, Invalid Input is displayed and the loop continues until a valid option is selected.

Two numbers are taken and an if...elif...else branching is used to execute a particular section. User-defined functions add(), subtract(), multiply() and divide() evaluate respective operations and display the output.