Question

Write a Python script that will be used as a calculator to allow simple arithmetic computation of two input integer numbers.

Requirements:

a. The script should first allow the user to select if they want to add, subtract, multiply or divide two integer digits.

b. The script should pass the user inputs to a function using arguments for computation and the results return to the main part of the script.

c. The return value will be tested to determine if it is a positive number or a negative number.

Answer 1

CODE:

# function to get choice from user
def choice():
    ch = int(input("Please choose (1 - Add, 2 - Subtract, 3 - Multiply, 4- Divide) ? "))

    # if choice is wrong then ask user to re-enter
    while (ch < 1 or ch > 4):
        ch = input("Wrong choice. Please choose (1 - Add, 2 - Subtract, 3 - Multiply, 4- Divide) ? ")

    # return choice
    return ch

# function to compute result
def compute(num1, num2, choice):

    # for addition
    if choice == 1:
        return num1 + num2
    # for subtraction
    elif choice == 2:
        return num1 - num2
    #for multiplication
    elif choice == 3:
        return num1 * num2
    # for division
    else:
        return num1 / num2

if __name__ == '__main__':

    # get choice
    ch = choice()
    # get input numbers from user
    num1 = float(input("Enter number 1: "))
    num2 = float(input("Enter number 2: "))
    # get result
    result = compute(num1,num2,ch)

    # check if result is negative or positive
    if result >= 0:
        print("The result is positive.")
    else:
        print("The result is negative.")

    # display the result upto 2 decimal places
    print("The result is {:.2f}".format(result))

OUTPUT:

Scenario 1:

Scenario 2:

Scenario 3: