计算1到n的和

sum = 0
i = 1
n = input('请输入计算1到n的和,n的数值:')
while i < int(n):

    sum = sum + i

# 如果为2,就是偶数和

    i = i + 1




print(sum)

猜你喜欢

转载自blog.csdn.net/pysvn8a/article/details/80465110