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Adds one or more items to the end of an array.

my @animals = ("cat");
push(@animals, "mouse"); # ("cat", "mouse")

my @colors = ("red");
push(@colors, ("blue", "green")); # ("red", "blue", "green")

Returns the number of elements in the array following the completed push.

my $color_count = push(@colors, ("yellow", "purple"));

say "There are $color_count colors in the updated array";

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.