Lua Tutorial

local term = require( "term")
local running = true

while running do
  term.clear()
  print("This is a Lua tutorial! Would you like to learn Lua?")
  local a = io.read()
    if a == "yes" then
      print("Good, let's begin.")
    elseif a == "no" then
      print("Sorry to hear that. have a good day!")
      running = false
    else
      print("answer with Yes or no please.")
    end
end

--Credit to: TheFox for helping me correct my code.