return - return or resume execution and copy some local variables
In a function return stops the execution of the function, [..]=return(..) stops the execution of the function and put the local variables ai in calling environnement under names xi.
In pause mode, it allows to return to upper level [..]=return(..) returns to upper level and put the local variables ai in calling environnement under names xi.
In an execstr called by a function [..]=return(..) stops the execution of the function and put the local variables ai in calling environnement under names xi.
resume is equivalent to return.