Youtube Python Mortgage Calculator (null zu Held)

Question

Dies ist ein Code, den ich von der Zero to Hero mit Python-Programmierung Tutorial von YouTube bekam, um eine Hypothek zu berechnen. Ich versuche zu verstehen, warum dieser Code mir nicht die gleichen Antworten gibt, die ich mit anderen Zahlungsrechnern bekomme. Ich weiß, es gibt auch andere Codes, die mir die richtige Antwort geben, aber ich versuche, herauszufinden, was mit diesem falsch ...

# M = L[i(1+i)n]/[(1+i)n-1] 


#Declare and initialize the variables 
monthlyPayment = 0 
loanAmount = 0 
interestRate = 0 
numberOfPayments = 0 
loanDurationInYears = 0 

#Ask the user for the values needed to calculate the monthly payments 
strLoanAmount = input("How much money will you borrow? ") 
strInterestRate = input("What is the interest rate on the loan? ") 
strLoanDurationInYears = input("How many years will it take you to pay off the loan? ") 

#Convert the strings into floating numbers so we can use them in the formula 
loanDurationInYears = float(strLoanDurationInYears) 
loanAmount = float(strLoanAmount) 
interestRate = float(strInterestRate) 

#Since payments are once per month, number of payments is number of years for the loan * 12 
numberOfPayments = loanDurationInYears*12 

#Calculate the monthly payment based on the formula 
monthlyPayment = loanAmount * interestRate * (1+ interestRate) * numberOfPayments \ 
    /((1 + interestRate) * numberOfPayments -1) 

#provide the result to the user 
print("Your monthly payment will be " + str(monthlyPayment)) 

#Extra credit 
print("Your monthly payment will be $%.2f" % monthlyPayment) 

Answer 1

habe ich ein ähnliches [Post] [1] Antwort für die folgender code:

# M = L[i(1+i)n]/[(1+i)n-1] 


#Declare and initialize the variables 
monthlyPayment = 0.0 
loanAmount = 0.0 
interestRate = 0.0 
numberOfPayments = 0.0 
loanDurationInYears = 0.0 

#Ask the user for the values needed to calculate the monthly payments 
strLoanAmount = input("How much money will you borrow? ") 
strInterestRate = input("What is the interest rate on the loan? ") 
strLoanDurationInYears = input("How many years will it take you to pay off the loan? ") 

#Convert the strings into floating numbers so we can use them in the formula 
loanDurationInYears = float(strLoanDurationInYears) 
loanAmount = float(strLoanAmount) 
interestRate = float(strInterestRate)/100/12 

#Since payments are once per month, number of payments is number of years for the loan * 12 
numberOfPayments = float(loanDurationInYears)*12 

#Calculate the monthly payment based on the formula 
monthlyPayment = loanAmount * (interestRate * (1 + interestRate) ** numberOfPayments)/((1 + interestRate) ** numberOfPayments - 1) 

#provide the result to the user 
print("Your monthly payment will be " + str(monthlyPayment)) 

#Extra credit 
print("Your monthly payment will be $%.2f" % monthlyPayment) 


    [1]: http://stackoverflow.com/questions/29804843/formula-for-calculating-interest-python