gistfile1.rb

irb(main):001:0> for i in 1..10 do 
irb(main):002:1* puts i
irb(main):003:1> end
1
2
3
4
5
6
7
8
9
10
=> 1..10
irb(main):004:0> i
=> 10
irb(main):005:0> (1..10).each do |j|
irb(main):006:1* puts j
irb(main):007:1> end
1
2
3
4
5
6
7
8
9
10
=> 1..10
irb(main):008:0> j
NameError: undefined local variable or method `j' for main:Object
	from (irb):8