combinations.py

# Number of Combinations for pool size (n) and choosing (k) number per set.
# Author arose13
import math

def number_of_combinations(n, k):
    numer = n
    denom = k

    for i in range(1, k):
        numer = numer * (n - i)
        denom = denom * (i)

    combos = numer / denom

    print("-----------------------------")
    print("Number of combinations = " + str(combos))
    print("A number with " + str(math.floor(math.log10(combos))) + " zeros")
    print("-----------------------------")

# Expected answer = 2,598,960
number_of_combinations(52, 5)