# Python: Factorial of a number using itertools module

## Python Itertools: Exercise-20 with Solution

Write a Python program to find the factorial of a number using the itertools module.

**Sample Solution:**

**Python Code:**

```
import itertools as it
import operator as op
def factorials_nums(n):
result = list(it.accumulate(it.chain([1], range(1, 1 + n)), op.mul))
return result;
print("Factorials of 5 :", factorials_nums(5))
print("Factorials of 9 :", factorials_nums(9))
```

Sample Output:

Factorials of 5 : [1, 1, 2, 6, 24, 120] Factorials of 9 : [1, 1, 2, 6, 24, 120, 720, 5040, 40320, 362880]

**Python Code Editor:**

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**Previous:** Write a Python program which iterates the integers from 1 to a given number and print "Fizz" for multiples of three, print "Buzz" for multiples of five, print "FizzBuzz" for multiples of both three and five using itertools module.

**Next:** Write a Python program to find the years where 25th of December be a Sunday between 2000 and 2150.

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