def test{a=1,b=2,*c}
  puts "#(a),#(b)"
  c.each{|x| print " #{x}, "}  # We will learn about "each" very soon.  I promise.
end
test 3, 6, 9, 12, 15, 18

$grade = 10
$school = case grade
when 0..5
   "elementary"
when 6..8
   "middle school"
when 9..12
   "high school"
else
   "college"
end
puts "grade #{grade} is in #{school}"

$i = 0
while $i  < 5
  $i = $i+1
  puts $i
end