def search(array, goal) i = 0 until i == array.size do if array[i] == goal return i end if (array[array.size - i] == goal) return array.size - i end i += 1 end return false end array = [1, 4, 6, 3, 7, 9, 2, 10, 12] goal = 7 position = search(array, goal.to_i) puts position goal = 8 position = search(array, goal.to_i) puts position