Python代码作业二

#方法一
sum = 0
for i in range(501):
    sum = sum + i
print(sum)

#方法二
ans = (1+500) * 500 / 2
print(int(ans))

#方法三
def summ():
    sum = 0
    for x in range(501):
        sum = sum + x
    print(sum)
summ()

![请添加图片描述](https://img-blog.csdnimg.cn/d72dd0d414154033ae7305c377d70770.png)