10 examples of 'factorial of a number in javascript' in JavaScript

5
export default function factorial(number) {
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  let result = 1;
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  for (let i = 2; i <= number; i += 1) {
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    result *= i;
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  }
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  return result;
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}

1
function factorial(num) {
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    if (num === 1) {
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      return num;
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    } else {
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      let hitung = num * factorial(num - 1);
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      console.log(hitung);
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      return num * factorial(num - 1);
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    }
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  }

3
function factorialize(num) {
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	if (num<=1) {
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		return 1;//0的阶乘为0,同时也是递归出口
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	}
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  return num*factorialize(num-1);//使用递归
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}

25
function factorialize(num) {
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  if (num < 2) {
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    return 1;
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  }
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  return num * factorialize(num - 1);
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}

194
function factorial(num) {
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  const f = [];
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  function inner(n) {
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    if (n === 0 || n === 1) {
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      return 1;
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    }
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    if (f[n] > 0) {
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      return f[n];
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    }
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    return f[n] = inner(n - 1) * n;
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  }
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  return inner(num);
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}

2
function factorial(a) {
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    a = parseInt(a);
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    if (a <= 0)
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        return 1;
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    else
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        return a * factorial(a - 1);
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}

11
function factorial(n) {
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    if (n < 1) {
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        return 1;
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    } else {
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        return n * factorial(n - 1);
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    }
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}

4
function unfactorial(num) {
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  var d = 1;
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  while (num > 1 && Math.round(num) === num) {
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    d += 1;
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    num /= d;
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  }
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  if (num === 1) return d + "!";
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  else return "NONE";
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}

335
function factorial(n) {
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    if (n == 0) {
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        return 1;
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    }
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    f = libs.BigInteger.BigInteger.ONE;
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    for (var i=1; i<=n; i++) {
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        f = f.multiply(new libs.BigInteger.BigInteger(i));
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    }
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    return f;
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}

15
function factorial(n){
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    if ((n == 0) || (n == 1))
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        return 1;
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    else
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        return (n * factorial(n - 1));
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}