RosettaCodeData/Task/Introspection/Frink/introspection.frink

if FrinkVersion[] < "2024-01-01"
{
   println["Version of Frink is too old."]
   exit[]
}

if isVariableDefined["bloop"]
{
   func = getFunction["abs",1]
   if func != undef
      println[func[bloop]]
}