Re: Lua 5.3 Integer

[Roberto Ierusalimschy <roberto@...>]

> Is there any way to enforce integer arithmetic in Lua 5.3
> 
> e.g.
> 
> x = 5 / 2 -- => 2
> where x is an integer?

1) Do not use '/' or '^'.

2) For any value that enters the computation that you cannot be sure
it is an integer, apply a conversion to it. How to convert depends
on you:

- x | 0   -- fast, raises an error if x is not an integer value

- math.tointeger(x)      -- returns falsy if x is not an integer value

- math.floor, math.ceil, math.modf
     -- rounds x (but the result may not be in the proper range)


-- Roberto