Ruby学習 loop
;while loop you don't know how many times you'll be looping.
;until loop 1 between 10
counter=1
until counter==11
puts counter
counter+=1
end
;for loop you know how many times you'll be looping.
for num in 1..10
puts num
end
;loop method
i=20
loop do
i-=1
next i % 2 !=0
puts "#{i}"
break if i<=0
end