JAVA课程3 DO…WHLIE语句输出1！+1/2!+1/3!前20项目之和

public class test81{public static void main(String srgs[]){System.out.print("DO…WHILE语句输出1!+1/2!+1/3!……前20项之和");int a=1;int s=1;double d=0;do{s=a*s;d=1.0/s+d;a++;}while (a<=20);System.out.print(d);}}