To test if a value is in an array?

Method 1: 

@int_array = (7,101,80,22,42);

if ( grep $_ == 80, @int_array ) {

print "80 exists in an array..."; 

}  

Method 2:

#!/usr/bin/env perl
use strict;
use warnings;
use List::Util 'first';
my @int_array       = qw( 7 101 80 22 42 );
my $number_to_check = 80;
if ( first { $_ == $number_to_check } @int_array ) {
    print "$number_to_check exists in ", join ', ', @int_array;
}
 

Method 3: 

use List::MoreUtils qw{any}; print "found!\n" if any { $_ == 7 } (7,101,80,22,42);