Calculator

version = "0.5b"
print("Welcome to calculator v"..version..". It's a basic text calculator")
io.write("What calculate? \n>")

text = io.read()
num = 1
word = {}

for text in string.gmatch(text, "%S+") do
  word[num] = text
  num = num + 1
end

n = 3
loop = true
answ = word[1]

while loop do
  if word[n - 1] == "+" then
    answ = answ + word[n]
  elseif word[n - 1] == "-" then
    answ = answ - word[n]
  elseif word[n - 1] == "/" then
    answ = answ / word[n]
  elseif word[n - 1] == "*" then
    answ = answ * word[n]
  end
  n = n + 2
  if #word < n then
    loop = false
  end
end

print(answ)