fibonacci

public class Fibonacci
{
    public static void main( String args[] )
    {
        int current = 0;
        int previous = 1;
        int beforeprevious = 0;

        for( int i=0; i<20; i++)
        {
            current = previous + beforeprevious;
            System.out.print( current + " " );
            beforeprevious = previous;
            previous = current;
        }
    }
}