【python基础】多方法实现1-100累加求和

以下给出五种解题角度（for循环、while循环、列表推导式、reduce函数、递归函数）

①for循环

sum = 0
for i in range(101):
    sum += i
print(sum)

②while循环

sum = 0
i=1
while i <= 100:
    sum += 1
    i += 1
print(sum)

③列表推导式（直接利用sum函数）

sum = sum([i for i in range(101)])
print(sum)

④reduce函数

from functools import reduce
sum = reduce(lambda x,y: x + y,range(101))
print(sum)

⑤递归函数

def sum_recursive(n):
    if n == 0:
        return 0
    return n + sum_resursive(n-1)

sum = sum_recursive(100)
print(sum)