题解 | #数列求和#
数列求和
http://www.nowcoder.com/practice/6893484c04c24bfca1f606b1823a468d
public class Main { public static void main(String[] args) { //write your code here........ long sum=0; long Firstshu=9; for(int i=1;i<=10;i++) { sum=sum+Firstshu; Firstshu=Firstshu*10+9; } System.out.println(sum); } }