>Check this out!
>Run this:
>

>x=199.07
>x=x - 185.27
>x = x  - 13.80
>?"---"    && Result
>?x        && Print 0.00
>?EMPTY(x) && Print .F.
>

>
>Anyone know why?

Jean-Rene,

this is due to the arithmetic in double precision.
vfp keeps track of the number of (significant ??) decimals that were used when the variable was defined and used in calculations

empty() does not take the number of decimals into account where (x=0) does (2nd example)

x=199.07
x=x - 185.27
x = x  - 13.80
?empty(x) && FALSE
??x-0.000000000000000000000000000000   && -0.000000000000018000

?(x=0)  && TRUE

&&----------------------------------
x=199.07
x=x - 185.2700000000000000000000000
x = x  - 13.8000000000000000000000000000000

? x && -0.000000000000018000

?empty(x) && FALSE
?(x=0)  && FALSE !!!!