python上机实验

Question

 

Answer 1

#partD
a = int(input("请输入一个正整数："))
b = 1
for i in range(1, a+1):
    if i % 2 == 1:
        b *= i
print(b)

#partE
a = int(input("请输入一个数："))
print(abs(a))

#求20！阶乘的和
n = 20
tmp = 1
sum_num = 0
for i in range(1, n + 1):
    tmp = tmp * i
    sum_num = sum_num + tmp
print('%d! 的和是 %d ' % (n, sum_num))