How would I make a factorial calculator function?
How would I make a factorial calculator function? I need that to make a permutations and combinations calculator. I am pretty sure you would need a loop of some sort, but I'm not sure how to do it. Thanks for the help!
factorials: n × (n - 1) × (n - 2) ... 2 × 1
you can try using for loop variable to start at n and go to 1
and get something to hold the product of the multiplication inside the loop
Wdym? @mwilki7
@RohilPatel
this is how you can implement the factorial function on your calculator
How do get the number of numbers before hitting 1? @mwilki7
let product = 1; for (let i = 0; i < n; i++) { product *= i; }
Is n the number ur "factorialing" by? @mwilki7
@RohilPatel
yes, if i want to find the factorial of 5, n would be 5
Hmm, it's not working. @mwilki7
@RohilPatel
what are the results you are getting
Try it ur self. @mwilki7
@RohilPatel Make the iterator start from 1 and not 0. Multiplication by 0 just makes the product, well, 0.
have you tried googling? I found this quite easily: https://www.sitesbay.com/javascript/javascript-factorial-of-number
Do you know about recursion? It can be used instead of a loop: https://www.w3resource.com/javascript-exercises/javascript-recursion-function-exercise-1.php
Sort of but not much luck , @malvoliothegood