how to make a factorial function in javascript

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showing results for - "how to make a factorial function in javascript"
Sofia
25 Feb 2019
1function factorial(n) {
2  if (n < 0) return;
3  if (n < 2) return 1;
4  return n * factorial(n - 1);
5}
Aubree
20 May 2017
1function factorialize(num) {
2  if (num === 0 || num === 1)
3    return 1;
4  for (var i = num - 1; i >= 1; i--) {
5    num *= i;
6  }
7  return num;
8}
9factorialize(5);
Jibril
01 Jan 2019
1function factorialize(num) {
2  var result = num;
3  if (num === 0 || num === 1) 
4    return 1; 
5  while (num > 1) { 
6    num--;
7    result *= num;
8  }
9  return result;
10}
Julian
27 Feb 2018
1// Simple arrow function solution
2var factorial = n => (n <= 0) ? 1: n * factorial(n - 1);
Dante
20 Aug 2020
1    function factorial(n) {
2        if (n > 1) {
3            return n * factorial(n - 1);
4        }
5        return 1;
6    }
Angelo
15 Apr 2017
1const factorial = n => n <= 1 ? 1 : n * factorial(n - 1);
2
3// Examples
4factorial(2);   // 2
5factorial(3);   // 6
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