Unable to get the factorial output in Java script

Question

function main() {
var number = parseInt(readLine(), 10)
var factorial = 1;
// Your code here
var x= number;
for(x;x>=1;){
y=x-1}
console.log(y*x)
}

Answer 1

Call the function
main()

Answer 2

Nishant Kumar

Here's what mine looks like. It's just one way that works. I added a check for input that was 0 or 1 bc those are always 1. Feel free to message me with questions. I'll help within 24-48 hours bc of school and work.

function main() {
var number = parseInt(readLine(), 10)
var factorial = 1;
// Your code here

var num = number;

if (num == 0 || num == 1) {
console.log(1);
}

else {

var i=num-1;

for (i; i>1; i--) {
num *= i;
}

console.log(num);

}
}