Scala Programming Projects

Writing the function body

In functional programming, we avoid mutating variables. In an imperative language, you would typically implement nbOfMonthsSaving by using a while loop. It is also possible to do so in Scala, but it is a better practice to only use immutable variables. One way of solving this problem is to use recursion:

def nbOfMonthsSaving(interestRate: Double, nbOfMonthsInRetirement: Int,                     netIncome: Int, currentExpenses: Int, initialCapital: Double): Int = {  def loop(months: Int): Int = {    val (capitalAtRetirement, capitalAfterDeath) = simulatePlan(      interestRate = interestRate,      nbOfMonthsSaving = months, nbOfMonthsInRetirement =       nbOfMonthsInRetirement,      netIncome = netIncome, currentExpenses = currentExpenses,      initialCapital = ...