使用while循环语句计算1+1/2!+1/3!+1/4!+...的前20项和
package myJava; public class Example3_6 { public static void main(String[] args) { double sum = 0,item = 1; int i = 1,n = 20; while(i<=n) { sum = sum+item; i = i+1; item = item*(1.0/i); } System.out.println("sum="+sum); } }
运行结果:sum=1.7182818284590455