# Sample Answers for Lab Exam 1 (Spring 2012)

def f1(x,y)
  if x <= y then
    (x..y).each {|i| puts i if i%5 == 0}
  else
    puts "INVALID"
  end
  return nil
end


def f2(list)
  min_value = list[0]
  min_index = 0
  for i in 1..list.length-1 do
    if list[i] < min_value then
      min_value = list[i]
      min_index = i
    end
  end
  return min_index
end


def f3(list)
  for n in list do
    for i in 1..n do
      print "X"
    end
    print "\n"
  end
  return nil
end


def f4(n)
  sequence = Array.new(n)
  sequence[0] = 1
  for i in 1..n-1 do
    sequence[i] = sequence[i-1] + i
  end
  return sequence
end