In this exercise you'll be working with savings accounts. Each year, the balance of your savings account is updated based on its interest rate. The interest rate your bank gives you depends on the amount of money in your account (its balance):
1000 dollars.1000 dollars and less than 5000 dollars.5000 dollars.Each year the government allows you to donate a percentage of your money to charity, tax free. Because you're a nice person, if your balance ends up positive at the end of the year, you take the tax-free percentage and double it, rounding down to the nearest whole dollar. You don't mind paying tax on the second half of the donation.
You have three tasks, each of which will deal with your balance and its interest rate.
Implement the interestRate function to calculate the interest rate based on the specified balance:
interestRate 200.75m
// => 0.5fNote that the value returned is a single.
Implement the interest method to calculate the interest based on the specified balance:
interest 200.75m
// => 1.00375mNote that the value returned is a decimal.
Implement the annualBalanceUpdate function to calculate the annual balance update, taking into account the interest rate:
annualBalanceUpdate 200.75m
// => 201.75375mNote that the value returned is a decimal.
Implement the amountToDonate function to calculate how much money to donate to charities based on the balance and the tax-free percentage that the government allows:
let balance = 550.5m
let taxFreePercentage = 2.5
amountToDonate balance taxFreePercentage
// => 27Note that the value returned is an int.
In this exercise you'll be working with savings accounts. Each year, the balance of your savings account is updated based on its interest rate. The interest rate your bank gives you depends on the amount of money in your account (its balance):
1000 dollars.1000 dollars and less than 5000 dollars.5000 dollars.Each year the government allows you to donate a percentage of your money to charity, tax free. Because you're a nice person, if your balance ends up positive at the end of the year, you take the tax-free percentage and double it, rounding down to the nearest whole dollar. You don't mind paying tax on the second half of the donation.
You have three tasks, each of which will deal with your balance and its interest rate.
Implement the interestRate function to calculate the interest rate based on the specified balance:
interestRate 200.75m
// => 0.5fNote that the value returned is a single.
Implement the interest method to calculate the interest based on the specified balance:
interest 200.75m
// => 1.00375mNote that the value returned is a decimal.
Implement the annualBalanceUpdate function to calculate the annual balance update, taking into account the interest rate:
annualBalanceUpdate 200.75m
// => 201.75375mNote that the value returned is a decimal.
Implement the amountToDonate function to calculate how much money to donate to charities based on the balance and the tax-free percentage that the government allows:
let balance = 550.5m
let taxFreePercentage = 2.5
amountToDonate balance taxFreePercentage
// => 27Note that the value returned is an int.