题解 | 数列求和
数列求和
https://www.nowcoder.com/practice/6893484c04c24bfca1f606b1823a468d
public class Main
{
public static void main(String[] args)
{
long i=9;
long sum=0;
int k=0;
while(k<10)
{
sum+=i;
i=i*10+9;
k++;
}
System.out.print(sum);
}
}
