FWIW, perl 5.16.1 :) 
$ perl -e " print 1 + Infinity "
1.#INF
$ perl -e " print 1 + inf"
1.#INF
$ perl -e " print  int inf"
1.#INF
$

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In reply to Re^2: Infinity recognized as number by Anonymous Monk
in thread Infinity recognized as number by fglock

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