1.6 KiB
1.6 KiB
title | id | challengeType | videoUrl | localeTitle |
---|---|---|---|---|
Evaluate binomial coefficients | 598de241872ef8353c58a7a2 | 5 | Avaliar coeficientes binomiais |
Description
Escreva uma função para calcular o coeficiente binomial para o valor dado de n e k.
Esta fórmula é recomendada:
$ \ binom {n} {k} = \ frac {n!} {(nk)! k!} = \ frac {n (n-1) (n-2) \ ldots (n-k + 1)} { k (k-1) (k-2) \ ldots 1} $Instructions
Tests
tests:
- text: <code>binom</code> é uma função.
testString: 'assert(typeof binom === "function", "<code>binom</code> is a function.");'
- text: '<code>binom(5,3)</code> deve retornar 10.'
testString: 'assert.equal(binom(5, 3), 10, "<code>binom(5,3)</code> should return 10.");'
- text: '<code>binom(7,2)</code> deve retornar 21.'
testString: 'assert.equal(binom(7, 2), 21, "<code>binom(7,2)</code> should return 21.");'
- text: '<code>binom(10,4)</code> deve retornar 210.'
testString: 'assert.equal(binom(10, 4), 210, "<code>binom(10,4)</code> should return 210.");'
- text: '<code>binom(6,1)</code> deve retornar 6.'
testString: 'assert.equal(binom(6, 1), 6, "<code>binom(6,1)</code> should return 6.");'
- text: '<code>binom(12,8)</code> deve retornar 495.'
testString: 'assert.equal(binom(12, 8), 495, "<code>binom(12,8)</code> should return 495.");'
Challenge Seed
function binom (n, k) {
// Good luck!
}
Solution
// solution required