题解 | #牛牛的西格玛#
牛牛的西格玛
http://www.nowcoder.com/practice/c6b750ee8853484f8dbf14b9531b501f
import java.util.Scanner;
public class Main{
public static void main(String[] args){
Scanner scanner = new Scanner(System.in);
int num = scanner.nextInt();
int target = 0;
for(int index = 1; index <= num; index++){
target += index;
}
System.out.print(target);
}
}
