## Factorial digit sum

First read the problem description.

```
from math import factorial
= 0
s = factorial(100)
n while n > 0:
+= n % 10
s //= 10 n
```

Source code of the solution(s):

#Skip to menu
# Home
— Project Euler
(feed)

## Factorial digit sum

Source code of the solution(s):

First read the problem description.

```
from math import factorial
= 0
s = factorial(100)
n while n > 0:
+= n % 10
s //= 10 n
```

Source code of the solution(s):