Python – math.comb() method
Math module in Python contains a number of mathematical operations, which can be performed with ease using the module.
math.comb() method in Python is used to get the number of ways to choose k items from n items without repetition and without order. It basically evaluates to n! / (k! * (n – k)!) when k n. It is also known as binomial coefficient because it is equivalent to the coefficient of k-th term in polynomial expansion of the expression (1 + x)n.
This method is new in Python version 3.8.
Syntax: math.comb(n, k)
n: A non-negative integer
k: A non-negative integer
Returns: an integer value which represents the number of ways to choose k items from n items without repetition and without order.
Code #1: Use of
Code #2: When k > n
Code #3: Use of
math.comb() method to find coefficient of k-th term in binomial expansion of expression (1 + x)n
Reference: Python math library