题解 | #求1+2+3+...+n#
求1+2+3+...+n
http://www.nowcoder.com/practice/7a0da8fc483247ff8800059e12d7caf1
//直接递归
public class Solution {
public int Sum_Solution(int n) {
if(n == 1){
return 1;
}
return Sum_Solution(n-1) + n;
}
}
