计算sum=1+2...+n，要求number和sum的类型都是int，且sum在32位以内~

import java.util.Scanner;
public class CaculactorSum {
    public static void main(String[] args) {
        Scanner sc=new Scanner(System.in);
        int number=sc.nextInt();
        adding(number);
    }
    public static  int adding(int x) {
        int  sum = 0;
        for (int i = 1; i <= x && (sum <= Integer.MAX_VALUE); i++) {
            sum += i;
        }
        System.out.println(sum);
        return sum;
    }
}

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