u Calculate e

public class Main{
    public static void main(String args[]) {
        System.out.println("n e
" + 
                "- -----------");
        for(int i=0;i<10;i++) {
            System.out.print(i+" ");
            if(i==0) {
                System.out.println(1);
                continue;
            }
            if(i==1) {
                System.out.println(2);
                continue;
            }
            if(i==2) {
                System.out.println(2.5);
                continue;
            }
            double sum=1;
            double mul=1;
            for(int j=2;j<=i;j++) {
                mul*=j;
                sum+=1/mul;
            }
            sum+=1;
            System.out.printf("%.9f",sum);
            System.out.println();
        }
    }
}