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id, title, challengeType, forumTopicId, dashedName
| id | title | challengeType | forumTopicId | dashedName |
|---|---|---|---|---|
| a302f7aae1aa3152a5b413bc | Factorialize a Number | 1 | 16013 | factorialize-a-number |
--description--
Return the factorial of the provided integer.
If the integer is represented with the letter n, a factorial is the product of all positive integers less than or equal to n.
Factorials are often represented with the shorthand notation n!
For example: 5! = 1 * 2 * 3 * 4 * 5 = 120
Only integers greater than or equal to zero will be supplied to the function.
--hints--
factorialize(5) should return a number.
assert.isNumber(factorialize(5));
factorialize(5) should return 120.
assert.strictEqual(factorialize(5), 120);
factorialize(10) should return 3628800.
assert.strictEqual(factorialize(10), 3628800);
factorialize(20) should return 2432902008176640000.
assert.strictEqual(factorialize(20), 2432902008176640000);
factorialize(0) should return 1.
assert.strictEqual(factorialize(0), 1);
--seed--
--seed-contents--
function factorialize(num) {
return num;
}
factorialize(5);
--solutions--
function factorialize(num) {
return num < 1 ? 1 : num * factorialize(num - 1);
}
factorialize(5);