JAVA-方法练习1—求和

package com.itheima;

//1-n之间的数求和，n>1
public class methodmedo07 {
    public static void main(String[] args) {
        int restul = sum(5);
        System.out.println("1-5的求和结果是："+restul);

    }

    public static int sum(int n) {
        int sum = 0;
        for (int i = 1; i <= n; i++) {

            sum += i;

        }
        return sum;
    }
}