java实现求1+2+3+...+n的和，及其之间的奇偶数和

import java.util.Scanner;

public class Test {
    public static void main(String[] args) {
        System.out.println("请输入一个要求和的数:");
        int number = new Scanner(System.in).nextInt();
        int sum = 0;
        int oddSum = 0;
        for (int i = 0; i <= number; i++) {
            sum += i;
            if (i % 2 != 0) {
                oddSum += i;
            }
        }
        int evenSum = sum - oddSum;
        System.out.println("1-" + number + "之间的和为:" + sum);
        System.out.println("1-" + number + "之间的奇数和为:" + oddSum);
        System.out.println("1-" + number + "之间的偶数和为:" + evenSum);
    }
}

运行结果:

请输入一个要求和的数:
100
1-100之间的和为:5050
1-100之间的奇数和为:2500
1-100之间的偶数和为:2550