用python怎么做呀

Question

编写程序计算如下数列的值:

1-2+3-4...-200中，所有数字为整数，从1开始递增，奇数

为正，偶数为负，

Answer 1

newList = []
for i in range(1,201):
  if i % 2 == 0:
    newList.append("-"+str(i))
  else:
    newList.append(str(i))
newIntList = [int(i) for i in newList]
print(newIntList)
print(sum(newIntList))