Scala - Sample usage of fold() instead of getOrElse()

SampleFold.scala

// This sample demonstrates how fold(...) can be employed instead
// of getOrElse(...) in cases you need to process the value of an
// Option.

def informTaxDue(tax: Option[Float]) : String =
  tax.fold("not declared") {
    v: Float =>
      if(v==0.0) "nothing to pay" else s"tax due is ${v}"
  }

println( informTaxDue(None:Option[Float]) )
// prints "not declared"

println( informTaxDue(Option(0.0)) )
// prints "nothing to pay"

println( informTaxDue(Option(250.78)) )
// prints "tax due is 250.78"