Hi teddy6507,

The code and input you show do not match the behavior you describe - please see How do I post a question effectively? and Short, Self Contained, Correct Example.

When I fix the capitalization of "pin" and "layer", and add the missing while(<>) {...} loop, the code works for me, and I can get the maximum layer number with the code

use List::Util qw/max/;
print max(@num), "\n";

[download]

I can only guess as to why you get the output "210": maybe you're doing print @num; instead of print "@num"; (see $,), or you've got $" set to the empty string.

In any case, to avoid such ambiguities it's usually much better to use a module like Data::Dumper or Data::Dump to debug your data structures.

use Data::Dump 'pp';
pp \@num;
__END__
[2, 1, 0]

[download]

Hope this helps,
-- Hauke D

In reply to Re: how to capture the max value of the array by haukex
in thread how to capture the max value of the array by teddy6507

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