求1+2!+3!+...+9!的和。python
时间: 2023-11-23 09:06:16 浏览: 41
以下是Python代码,用于计算1+2!+3!+...+9!的和:
```python
def factorial(n):
if n == 0:
return 1
else:
return n * factorial(n-1)
sum = 0
for i in range(1, 10):
sum += factorial(i)
print(sum) # 输出:409113
```
相关问题
5.编写程序,求1!+3!+5!+7!+9! Python
以下是Python程序,用于计算1!+3!+5!+7!+9!的值:
```python
def factorial(n):
if n == 0:
return 1
else:
return n * factorial(n-1)
result = 0
for i in range(1, 10, 2):
result += factorial(i)
print(result)
```
输出结果为: 1!+3!+5!+7!+9!=1+6+120+5040+362880= 368547
计算1!+2!+3!+...+9!
以下是两种计算1!+2!+3!+...+9!的方法:
1. 使用for循环和阶乘函数来计算:
```python
def factorial(n):
result = 1
for i in range(1, n+1):
result *= i
return result
sum = 0
for i in range(1, 10):
sum += factorial(i)
print(sum) # 输出:409113
```
2. 使用递归函数来计算:
```python
def factorial(n):
if n == 0:
return 1
else:
return n * factorial(n-1)
def sum_factorial(n):
if n == 1:
return 1
else:
return factorial(n) + sum_factorial(n-1)
print(sum_factorial(9)) # 输出:409113
```