factorial javascript Code Snippet in 2025
mathalgorithmrecursionbeginner
Last Updated: 29 November 2025
Calculates the factorial of a number.
- Use recursion.
- If
nis less than or equal to1, return1. - Otherwise, return the product of
nand the factorial ofn - 1. - Throw a
TypeErrorifnis a negative number.
const factorial = n =>
n < 0
? (() => {
throw new TypeError('Negative numbers are not allowed!');
})()
: n <= 1
? 1
: n * factorial(n - 1);factorial(6); // 720javascript snippet similar to factorial For You in November 2025
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