Anonymous user
Evaluate binomial coefficients: Difference between revisions
Add Swift
(Add Swift) |
|||
Line 2,427:
<lang stata>. display comb(5,3)
10</lang>
=={{header|Swift}}==
<lang swift>func factorial<T: BinaryInteger>(_ n: T) -> T {
guard n != 0 else {
return 1
}
return stride(from: n, to: 0, by: -1).reduce(1, *)
}
func binomial<T: BinaryInteger>(_ x: (n: T, k: T)) -> T {
let nFac = factorial(x.n)
let kFac = factorial(x.k)
return nFac / (factorial(x.n - x.k) * kFac)
}
print("binomial(\(5), \(3)) = \(binomial((5, 3)))")
print("binomial(\(20), \(11)) = \(binomial((20, 11)))")</lang>
{{out}}
<pre>binomial(5, 3) = 10
binomial(20, 11) = 167960</pre>
=={{header|Tcl}}==
| |||