How to express infinity in Ruby?

Question

Is there a keyword to express Infinity in Ruby?

Answer 1

http://www.ruby-doc.org/stdlib-1.9.3/libdoc/bigdecimal/rdoc/BigDecimal.html#label-Infinity

1.9.3p429 :025 > BigDecimal('Infinity')
 => #
1.9.3p429 :026 > BigDecimal('-Infinity')
 => #
1.9.3p429 :027 > 3 < BigDecimal('Infinity')
 => true

1.9.3p429 :028 > BigDecimal::INFINITY
 => #