push ARRAY,LIST

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 push.

Starting with Perl 5.14, an experimental feature allowed push to take a scalar expression. This experiment has been deemed unsuccessful, and was removed as of Perl 5.24.