Problem Statement

This programming task, is to calculate ANY binomial coefficient. However, it has to be able to output

(

5 3

)

{\displaystyle {\binom {5}{3}}}

,   which is   10. This formula is recommended:

See Also:

Let's start with the solution:

proc binomialCoeff(n, k: int): int =
  result = 1
  for i in 1..k:
    result = result * (n-i+1) div i

echo binomialCoeff(5, 3)