Do you remember if GOSUB <label> or GOTO <line number> can take the contents of a variable as an input? If so, then higher-order functions seem possible. Edit

Do you remember if GOSUB <label> or GOTO <line number> can take the contents of a variable as an input? If so, then higher-order functions seem possible. Edit: it looks like in at least some versions of basic you can do: ON switching_variable GOSUB first_label, second_label, third_label, ...