Question

implement a formula of your own choosing, as a Python function, following these instructions:

• You need to write a function that takes multiple arguments (not input from the keyboard!), and that returns the result of a formula of your choosing (not printing the output on the screen!).
• For your function definition, choose a formula from mathematics, science, or a related field.
• Then, in the main part of the script, write the main Python code (outside of any function) that asks the user to input the appropriate values, then uses the function you just defined to do a calculation, and then outputs the result.
• Make sure that the user of the script knows what they are expected to input, what the script is going to calculate, and what the output means. (Remember that units are important!)
• Don't pick a formula that is too simple; make sure that it's got at least two variables, and that it uses more than one operation (so don't pick a formula such as the volume of a 'box' isVolume = length * width * height,

Answer 1

Thanks for the question, here is a financial function, that takes in the loan amount, annual interest rate and number of years and calculates the monthly interest rate and returns the monthly interest rate.

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# function calculates monthly interest
# functions takes in loan amount, annual interest rate , total number of years
def calculate_monthly_interest(loan_amount,annual_interest,years):
    monthlyRate=annual_interest/1200
    months=years*12
    monthly_payment = loan_amount * ((monthlyRate * ((1 + monthlyRate) ** months)) / ((1 + monthlyRate) ** months - 1))
    return monthly_payment


def main():

    loan_amount = float(input('Enter Loan Amount: '))
    rate = float(input('Enter annual interest rate (%): '))
    years = float(input('Enter number of years: '))
    monthly_interest= calculate_monthly_interest(loan_amount,rate,years)
    print('Your monthly interest will be :${0:.2f}'.format(monthly_interest))

main()