2005-01-15 irb (ruby)を使って計算 pc Ruby Class and Library Reference: module Math http://www.rubycentral.com/ref/ref_m_math.html $irb irb(main):001:0> include Math => Object irb(main):002:0> print 1 1=> nil irb(main):003:0> print exp(-4.70/0.5961) 0.000376503534254976=> nil irb(main):004:0> exit