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) {
//write your code here........
long sum=0,n=0;//定义为long类型，初始化sum,n为0
for(int i=0;i<10;i++){
n=n*10+9;//生成数列
sum+=n;
}
System.out.println(sum);
}
}
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