简单的递归函数

package com.atsico.pkg0806;

import org.junit.Test;

import java.lang.reflect.Constructor;
import java.lang.reflect.Field;

public class RunMain01 {
@Test
public void test_04() {
int sum = sum(3);
System.out.println(“递归求和结果：” + sum);
}

public int sum(int i) {
    if (i == 0)
        return 0;
    return i + sum(i - 1);
}

}

程序运行结果：ok