Python: Factorial of a number using itertools module

Last update on March 29 2025 13:03:22 (UTC/GMT +8 hours)

20. Factorial using Itertools

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]

For more Practice: Solve these Related Problems:

• Write a Python program to compute the factorial of a number using itertools.accumulate over a range of numbers.
• Write a Python program to generate a sequence of partial factorials for a given number using itertools.accumulate and then return the final value.
• Write a Python program to calculate the factorial of a number and then use map to convert the digits of the result into a list of integers.
• Write a Python program to compute factorials for a list of numbers using itertools and then filter out those that exceed a specified limit.

Python Code Editor:

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