Question

Hi, I am working on PS1 #3 ... I just cant produce the sample case in the instructions (its close but its not it

Answer 1

My code produce roughly the same result as the sample solution offers... it doesnt match the instruction though...

balance = float(raw_input('Enter the outstanding balance on your credit card: '))
interestRate = float(raw_input('Enter the annual credit card interest rate as a decimal: '))

newBalance = balance
lowerBound = balance / 12.0
upperBound = balance * (1 + interestRate / 12) ** 12.0 / 12.0
while abs(lowerBound - upperBound) > 0.001 :
monthlyPayment = (lowerBound + upperBound) / 2
newBalance = balance
for monthsNeeded in range(1,13):
newBalance = newBalance * (1 + interestRate / 12.0) - monthlyPayment
if newBalance <= 0:
break
if newBalance >= 0:
lowerBound = monthlyPayment
else:
upperBound = monthlyPayment

print 'RESULT'
print 'Monthly payment to pay off debt in 1 year: ' + str(round(monthlyPayment,2))
print 'Number of months needed: ' + str(monthsNeeded)
print 'Balance: ' + str(round(newBalance,2))


thanks in advance

Answer 2

Hey!

Like @bwCA told me a couple of days ago, print statements are a good way to debug your code and see how the problem is computed http://dpaste.com/767081/

What do you mean it doesn't do it like in the instructions? do you mean you get another result than the sample solution?

also, you should use a pasting site to refer to your code, like dpaste.com (i was told a few days ago:)