See looks_like_number in Scalar::Util like thus: 

use Scalar::Util qw(looks_like_number);

 for(qw(1 perl 25 monks)){
   looks_like_number $_ ? print $_," is a Number",$/ 
                        : print $_," is not a Number",$/;
 }

[download]
Update:
Awooooshhhh! davido, beat me to it.....

If you tell me, I'll forget.
If you show me, I'll remember.
if you involve me, I'll understand.
--- Author unknown to me

In reply to Re^5: number array with space by 2teez
in thread number array with space by MynameisAchint

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