CS-A1-Worksheet2

'''
Part 2: Loan

By Mark Wu 3217
'''

def calculateRemainingLoanBalance(principal, annualInterestRate, duration, number_of_payments):
    try:
        n = duration * 12 # n is the total month
        if annualInterestRate != 0:
            r = annualInterestRate / 100 / 12 # r is the monthly interest rate
        else:
            r = principal / n
        p = number_of_payments

        result = principal * ((1+r)**n - (1+r)**p) / ((1+r)**n - 1)
        return result
    except:
        return 'Error'

# print(calculateRemainingLoanBalance(1000.0, 4.5, 5, 12))