Python lambda function to calculate factorial of a number

Question

I have just started learning python. I came across lambda functions. On one of the problems, the author asked to write a one liner lambda function for factorial of a number.

Answer 1

Easy Method to find Factorial using Lambda Function

fac = lambda x : x * fac(x-1) if x > 0 else 1

print(fac(5))

output: 120

User Input to find Factorial

def fac():

    fac_num = int(input("Enter Number to find Factorial "))

    factorial = lambda f : f * factorial(f-1) if f > 0 else 1

    print(factorial(fac_num))

fac()

Enter Number to find Factorial : 5

120