freeCodeCamp/curriculum/challenges/portuguese/08-coding-interview-prep/rosetta-code/factorial.portuguese.md

title	id	challengeType	videoUrl	localeTitle
Factorial	597b2b2a2702b44414742771	5		Fatorial

Description

Escreva uma função para retornar o fatorial de um número.

Fatorial de um número é dado por:

n! = n * (n-1) * (n-2) * ..... * 1

Por exemplo: 3! = 3 * 2 * 1 = 6 4! = 4 * 3 * 2 * 1 = 24

Nota: 0! = 1

Instructions

Tests

tests:
  - text: <code>factorial</code> é uma função.
    testString: 'assert(typeof factorial === "function", "<code>factorial</code> is a function.");'
  - text: <code>factorial(2)</code> deve retornar um número.
    testString: 'assert(typeof factorial(2) === "number", "<code>factorial(2)</code> should return a number.");'
  - text: <code>factorial(3)</code> deve retornar 6. &quot;)
    testString: 'assert.equal(factorial(3),results[0],"<code>factorial(3)</code> should return 6.");'
  - text: <code>factorial(3)</code> deve retornar 120. &quot;)
    testString: 'assert.equal(factorial(5),results[1],"<code>factorial(3)</code> should return 120.");'
  - text: <code>factorial(3)</code> deve retornar 3.628.800. &quot;)
    testString: 'assert.equal(factorial(10),results[2],"<code>factorial(3)</code> should return 3,628,800.");'

Challenge Seed

function factorial (n) {
  // Good luck!
}

After Test

console.info('after the test');

Solution

// solution required