Round number up to the nearest multiple of 3

Question

Hay, how would i go about rounded a number up the nearest multiple of 3?

ie

25 would return 27 1 would return 3 0 would return 3 6 would return 6 

thanks

Answer 1

    if(n > 0)         return Math.ceil(n/3.0) * 3;     else if( n < 0)         return Math.floor(n/3.0) * 3;     else         return 3; 

Answer 2

Simply:

3.0*Math.ceil(n/3.0) 

?