how to use mod in variable that have big value

hi all, i have little problem here

how to use mod in variable that have big value??

ex:

u= 1.3447e+236 v= 345

then why when i use mod it's return zero??

mod(u,v)

am i make a mistake in my code??

Answer 1

[Sean de Wolski]

No. You've hit the limits of double precision floating point arithmetic. You would want vpi, which is no longer available, or it might be possible with the symbolic math toolbox.

[zikrullah muhammad]

thats mean i can use this code?

any sugestion? or other way to do that?

thank a lot for you answer

[Sean de Wolski]

No. It means working in double precision floating point will not get you a valid answer. You'll need to work with a class of operators that is not double precision floating point. The fixed-point toolbox (I've never used it) does that; the symbolic math toolbox does that, and John's vpi which is no longer available does that.

[Sean de Wolski]

Fixed point doesn't appear to have mod or rem.