Re: print("-5.3e - 10"*"2") doesnt work :/

[Javier Guerra <javier@...>]

On Thursday 27 April 2006 3:15 pm, Oldrich Svec wrote:
> Here (http://www.lua.org/pil/2.4.html) you can find an example of using
> strings (print("-5.3e - 10"*"2")) but it doesn't work(attempt to perform

if this is scientific notation (-5.3 x 10^-10), remove the spaces around the 
'-' and it works ok.

> arithmetic on a string value)... I use Lua 5.1.
> Generaly I want to use it to calculate strings (fe. "5+1+4" =>
> print("5+1+4"+"0") should give 10 but it doesnt work.. :(

use:

function calcstring (s)
    local f = loadstring ("return "..s)
    return f and f()
end

print (calcstring ("5+1+4")) => 10


-- 
Javier

Attachment: pgpjodf2gWq4L.pgp
Description: PGP signature