python计算1+1/2-1/3+1/4-1/5……n

Question

python计算1+1/2-1/3+1/4-1/5……n
谢谢各位帮我

Answer 1

num = 1
n = 100
for i in range(2,n+1):
    num += ((-1)**i/i)
print(num)