Math module in Python contains a number of mathematical operations, which can be performed with ease using the module.
math.perm() method in Python is used to get the number of ways to choose k items from n items without repetition and with order. It Evaluates to n! / (n – k)! when k <= n and evaluates to 0 when k > n.
This method is new in Python version 3.8.
Syntax: math.perm(n, k = None)
n: A non-negative integer
k: A non-negative integer. If k is not specified, it defaults to None
Returns: an integer value which represents the number of ways to choose k items from n items without repetition and with order. If k is none, method returns n!.
Code #1: Use of
Code #2: When k > n
Code #3: If k is not specified
Reference: Python math library
Attention geek! Strengthen your foundations with the Python Programming Foundation Course and learn the basics.
To begin with, your interview preparations Enhance your Data Structures concepts with the Python DS Course. And to begin with your Machine Learning Journey, join the Machine Learning – Basic Level Course