新人求助，用python

新人求助，用python

n = int(input('请输入一个整数：'))


def jisuan(n):
    s = 0
    for i in range(1,n+1):
        if i % 2 == 0:
            s -= 1 / i
        else:
            s += 1 / i
    print(round(s,4))
jisuan(n)

 

n = int(input())
s = 0
for i in range(1, n+1):
    s += ((-1)**(i+1)/i)
print('%.4f'% s)