=over =item push ARRAY,LIST X X Treats ARRAY as a stack by appending the values of LIST to the end of ARRAY. The length of ARRAY increases by the length of LIST. Has the same effect as for my $value (LIST) { $ARRAY[++$#ARRAY] = $value; } but is more efficient. Returns the number of elements in the array following the completed L|/push ARRAY,LIST>. Starting with Perl 5.14, an experimental feature allowed L|/push ARRAY,LIST> to take a scalar expression. This experiment has been deemed unsuccessful, and was removed as of Perl 5.24. =back