Jan 6, 2022 · def factorial(n): return 1 if n == 0 else n * factorial(n-1) One line lambda function approach: (although it is not recommended to assign lambda functions directly to a name, as it is considered a bad practice and may bring inconsistency to your code. It's always good to know. See PEP8.) factorial = lambda n: 1 if n == 0 else n * factorial(n-1)

May 1, 2013 · Many languages have an lgamma library function which computes the natural logarithm of the factorial of n-1. This means that you can compute the natural logarithm of factorial(n) via lgamma(n+1). You can divide by log10 to turn this into a base 10 logarithm.

def factorial(n): while n >= 1: return n * factorial(n - 1) return 1 Although the option that TrebledJ wrote in the comments about using if is better. Because while loop performs more operations (SETUP_LOOP, POP_BLOCK) than if. The function is slower. def factorial(n): if n >= 1: return n * factorial(n - 1) return 1

Oct 21, 2013 · Homemade factorial function in Python. 3. what is wrong with my factorial code in python. 0.

Mar 14, 2013 · Recursive Factorial is a function that will call itself, or be applied to itself, something like f(f). Let us set Factorial(n) to be f(f,n) and compute as follows: def func(f, n): # takes a function and a number, return a number. if n > 0 : return n * f(f, n-1) else : return 1

Aug 10, 2018 · def factorial(n: int): return n * factorial(n - 1) if n > 1 else 1 It recurses until the input number is 1, where it finally returns the result (in the case of n=0, it returns 1 since 0!=1). The solution also uses the ternary operator fit an if...else into one line.

Dec 16, 2013 · Function for factorial in Python. 0. Python Factorial program help. 0. Creating Python Factorial. 2 ...

If you want to vectorize sp.math.factorial and want arbitrarily large integers, you'll need to specify that the function return an output array with the 'object' datatype. For instance: fact = sp.vectorize(sp.math.factorial, otypes='O') Specifying the 'object' type allows Python integers to be returned by fact. These are not limited in size and ...

This will define a factorial function and a main function. The if block at the bottom will execute the main function, but only if the script is interpreted directly: ~> python3 test.py Please enter a number greater than or equal to 0: 4 4 factorial is 24 Alternatively, you can import your script into another script or an interactive session.

Oct 22, 2022 · There is no way to reduce the time complexity of the factorial function to below O(n), since n! has approximately n log n digits. That's assuming you're interested in wall time, and not the number of (big-int) arithmetic operations.