Password Generator

— Simple Password Generator —

local pass = ""

local nums = {1,2,3,4,5,6,7,8,9,0}

local letters = {"a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z"}

local special = {"/", ".", "_", ":", ";", "*", "-", "!", ",", "!", "'", "\""}

function genPass(length)
   local n = 0
   while n < tonumber(length)  do
      local t
      local op = math.random(1, 3)
      --print(op)
      if op == 1 then
         local ul = math.random(1,2)
         local i = letters[math.random(1,26)]
         if ul == 1 then
            t = string.lower(i)
         else
            t = string.upper(i)
         end
         pass = pass..t
      elseif op == 2 then
         pass = pass..nums[math.random(1,10)]
      else
         pass = pass..special[math.random(1,12)]
      end
      n = n + 1
   end
   return tostring(pass)
end

print("Password Generator")

print("Choose a length for your password: ")
local i = io.read()
if tonumber(i) == 0 then
   print("Not a number! Generating a password 20 characters long.")
   print("Password generated: ")
   print(genPass(20))
else
   print("Password generated: ")
   print(genPass(i))
end
sys.alert("vib")