小作业（# 求1-2+3-4+5 ... 99的所有数的和）

i = 0
b = 0
list_1 =list()
# print(type(list_1))
while i<99:
    i +=1
    list_1.append(i)
    b =-(i+1)
    list_1.append(b)
    print(list_1)
    i += 1
ret =sum(list_1)
print(ret)

 

求1-2+3-4+5 ... 99的所有数的和

转载于:https://www.cnblogs.com/PYlog/p/8579719.html