루비(4)

# <<< for + if >>>
number = 1..20
for i in number
  if(i%2 == 0)
    puts i
  else
    puts 0
  end
end

# <<< 숫자.chr >>>
a = 65..90
puts 65.chr

for i in a
  puts i.chr
end

# <<< 문자 --> 숫자 >>>
str = "this is a pen"
b = 0...str.length
for i in b
  str[i].each_byte do |byte|
    puts byte
  end
end