Collatz conjecture in lua

colConj.lua

function colConj(n)
    local t = {}
    if n < 0 then
        print("Try a positve number.")
    elseif n == 0 then
        print("Try a non-zero number.")
    else
        while n>1 do
            if (n%2) == 0 then
                n = n/2
            else
                n = 3*n+1
            end
            table.insert(t, n)
        end
        print("Entries: "..#t)
        for i=1, #t do
            print(t[i])
        end
    end
end

--[[
Usage: colConj(natural number)

Ex: 
> colConj(10)
Entries: 6
5
16
8
4
2
1
>
--]]