Lua练习9-斐波那数列

function fb(i)
    if i <= 2 and i > 0 then
        return 1
    else
        local j = fb(i - 1) + fb(i - 2)
        return j
    end
end

i = 1
while i <= 20 do
    print("想得到的斐波那的第"..i.. "个数是："..fb(i))
    i = i + 1
end