Hello,
I've been having an issue with a program that I'm writing. The program
works until it has to compute something:
def carPmt():
cost = requestInteger("How much does the car cost?")
downPmt = requestInteger("If there is a down payment, how much?")
tradeIn = requestInteger("If there is a trade-in, what is its value?")
years = requestInteger("How many years will you be paying?")
air = requestInteger("What is the interest rate?")
payment = calculatePayment(cost,downPmt,tradeIn,years,air)
print "With a down payment of",downPmt," a trade-in value of",tradeIn,
print ", an annual interest rate of",air,", your new",cost, "car will
cost",
print "you only",payment, "per month."
def calculatePayment(cost,downPmt,tradeIn,years,air):
carCostInitial = cost - downPmt
carCostIntermediate = carCostInitial - tradeIn
monIntRate = air/12
compoundingFactor = (1.0+monIntRate)**12.0/(1+monIntRate**12.0)-1.0
monthPmt = monIntRate*carCostIntermediate*compoundingFactor
return monthPmt
The first two sections work; the third one does not. When inputting random
values, I get this: "With a down payment of 5000 ,a trade-in value of 7000
,an annual interest rate of 2 ,your new 25000 car will cost you only 0.0
per month" Obviously I don't want my answer to be 0.0. I've had other
people look at it (although they aren't well-versed in Python) and they
couldn't help me isolate the problem.
Thanks a million.
Siobhan Wojcik
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