This is how one can find a maximum number in an array iteratively and recursively in Perl

#!/usr/bin/perl

my (@setOfnumbers);

@setOfnumbers = ( 9, 7, 90, 3, 8, 412, 67, 2, 45, 53, 1, 3,89 );


print "Finding maximum number iteratively ", 
getMaximumNumber(@setOfnumbers) , "\n";
print "Finding maximum number recursively ", 
findMaximumNumber(@setOfnumbers) , "\n";

#Finding maximum number iteratively
sub getMaximumNumber{
    my ($maximumNumber);
     $maximumNumber = @_[0];
    foreach(@_){
        if ($_ > $maximumNumber){
            $maximumNumber = $_;
        }
    }
    return $maximumNumber;
}


#Finding maximum number recursively
sub findMaximumNumber{
    
    my ($maximumNumber);
    
    if (@_ == 1){
        $maximumNumber = shift(@_);
        return $maximumNumber;
    }
    else{    
        $maximumNumber = shift(@_);
        return (findMaximumNumber(@_) > $maximumNumber) 
        ? findMaximumNumber(@_) : $maximumNumber;
    }
        
}
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