python中求1到100的和（循环变量的和）

>>> list(range(10))
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
>>> list(range(1,10))
[1, 2, 3, 4, 5, 6, 7, 8, 9]
>>> list(range(1,11))
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
>>> sum = 0
>>> for i in range(1,101):
    sum = sum + i

    
>>> print(sum)
5050
>>> test1 = [2,5,8,3]
>>> sum = 0
>>> for i in test1:
    sum = sum + i

    
>>> print(sum)
18