Returns true if the context of the currently executing subroutine or
eval is looking for a list value. Returns false if the context is looking for a scalar. Returns the undefined value if the context is looking for no value (void context).
return unless defined wantarray; # don't bother doing more my @a = complex_calculation(); return wantarray ? @a : "@a";
wantarray's result is unspecified in the top level of a file, in a
END block, or in a
This function should have been named wantlist() instead.