1 sum = 0

  2 i = 1

  3 while true

  4     sum += i

  5     i += 1

  6     break if i == 5001

  7 end

  8

  9 sum = 0

 10 (1..5000).each{|i|

 11     sum += i

 12 }

 13 puts sum

  1 a = 100

  2

  3 while true

  4     b = gets.to_i

  5     begin

  6         puts a/b

  7     rescue Exception => e

  8         puts "请不要输入 零"

  9         puts e

 10     end

 11 end

 12 

$ ruby 07error.rb

请不要输入 零

divided by