Given array find 3 elements that sum up to 0

For each i = 1..length do
  left = 0, right = length
  While left < i and right > i do
     if values[left] + values[i] + values[right] == 0
      # Got solution here
    if values[left] + values[i] + values[right] > 0
      # means that right border should be moved
      right--
   else
     # moving left border
      left++