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........
String a = "9";
long sum = 0;
for(int i = 0 ; i<10 ; i++){
sum += Long.parseLong(a);
a = a +"9";
if(i==9){
System.out.println(sum);
}
}
}
}
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