python中求1到100的和

 

>>> sum = 0
>>> for i in range(1,101):   ## 利用for循环
    sum += i

    
>>> print(sum)
5050
>>> del sum
>>> sum(list(range(1,101)))  ## 利用sum函数
5050
>>> sum = 0
>>> i = 1
>>> while i < 101:      ## while循环
    sum += i
    i += 1

    
>>> print(sum)
5050