Factorialize a Number - Basic Algorithm Scripting - Free Code Camp

In this basic algorithm scripting tutorial we factorialize a number. This is another tutorial that makes up a series where I cover the FreeCodeCamp curriculum. Enjoy!

[cosmelvillalobos]

Amazing is very easy to understand once you break it down step by step. Thank you for taking the time to explain it really makes a huge difference.

[zken]

A little tricky but its making sense Mr. Ian so thanks again for your teachings
function factorialize(num) {
let result = 1;

while (num > 0) {
result *= num;
num -= 1;
}
return result;
}
console.log(factorialize(5));

[ahmetmeliksahakdeniz]

Great solution! Your code looks super clean by the way. Here's mine:
function factorialize(num) {
if (num < 0) {
return "Negative integers cannot be factorialized!!!";
} else if (num === 0) {
return 1;
} else {
return num * factorialize(num - 1);
}
}

[astratow]

Thank you! Another splendid work of yours!

[troyhackney]

Thanks for this, I was trying to create a for loop, but it kept telling me that " i is not defined", the only difference here is that I did not include the "let result" variable :) Thanks again!

[georgylistopad]

const reverseString =(str) =>

also we can improve your's first solution with arrow function to make it all in one clear string of code :)

[nnourrrrr]

you made it clearer but its still difficult for me to understand

[rabih]

function factorialize(num) {
if(num==0) return 1
return num*factorialize(num-1)
}

[paulfanning]

I got the while loop pretty straight with how it runs through the code but can’t seem to understand the for loop like I don’t understand how it runs through the code.

[JonathanWrightZA]

Sheesh. And here I was trying to get a for loop to create an array of numbers between 1 and 'num', converting them to a string, then trying to .join() them with '*' and removing the ', '. Not worth xD

[--Dipanshu--]

didn't understood a thing. copypasta'ed.