计算e

1/1!+1/2!+1/3!+.......

public class Test2 {

	public static void main(String[] args) {
		System.out.print(printE());
		
	}
	public static double printE() {
		double e = 1;
		int i = 1;
		while((1.0/Factrial(i))>=1e-2)
		{
			e = e+1.0/Factrial(i);
			i++;
		}
		return e;
	}
	public static int Factrial(int n) {
		if(n==0||n==1) {
			return 1;
		}else {
				return  n*Factrial(n-1);
		}
	}
	

}