How to make object created within function usable outside

Question

I created a function which produces a matrix as a result, but I can\'t figure out how to make the output of this function usable outside of the function environment, so that

Answer 1

Can't you just use <<- to assign it the object to the workspace? The following code works for me and saves the amort_value object.

amortization <- function(cost, downpayment, interest, term) {
  amort_value <<- (cost)*(1-downpayment/100)*(interest/1200)*((1+interest/1200)^(term*12))/((1+interest/1200)^(term*12)-1)
  sprintf("$%.2f", amort_value)         

}
amortization(445000,20,3,15)
amort_value