Problem Statement

Take a string and repeat it some number of times.
Example: repeat("ha", 5)   =>   "hahahahaha" If there is a simpler/more efficient way to repeat a single “character” (i.e. creating a string filled with a certain character), you might want to show that as well (i.e. repeat-char("*", 5) => "*****").

Let's start with the solution:

declare
  fun {Repeat Xs N}
     if N > 0 then
        {Append Xs {Repeat Xs N-1}}
     else
        nil
     end
  end
in
  {System.showInfo {Repeat "Ha" 5}}