[Tutor] infinite while loop

[marcus.luetolf at bluewin.ch]

Hello Experts,

I'm stuck with not beeig able to stop the while loop in the script below
which should

yield the  minimumFixedMonthlyPayment (in steps of 10) to payoff a balance
in 12 months

according to the variables set.

 

The script below creates an indefinite loop and I don't understand why the
the loop

does not stop when the variable "previousBalance > yields negative values
despite

the condition set for the while loop.

Where is my mistake ?

 

>balance = 1000

>previousBalance = balance

 

>minimumFixedMonthlyPayment = 10

>annualInterestRate = 0.2

>monthlyInterestRate = (annualInterestRate) / 12.0

 

>while previousBalance > 0.0:

 

        >for i in range(12):

            >monthlyPaidBalance = (previousBalance) -
(minimumFixedMonthlyPayment)

            >updatedBalanceEachMonth = (monthlyPaidBalance) +
(monthlyInterestRate * monthlyPaidBalance)

            >previousBalance = updatedBalanceEachMonth

            >print('previousBalance:', round(previousBalance,2))

            >print('minimumFixedMonthlyPayment:',
minimumFixedMonthlyPayment)

        >previousBalance = balance

        >minimumFixedMonthlyPayment += 10

>print(previousBalance, minimumFixedMonthlyPayment)