How to do factorial for loop javascript

Question

Hi I tried doing the question for a factorial for loop in JavaScript and I can't figure out what I'm doing wrong, I've looked round on google and I don't see why this doesn't work

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

for (;number>0; number--){
factorial *=}
console.log(factorial)
}

It keeps saying one of the } is the problem and in honestly at a loss

Answer 1

the problem is this line:

factorial *=}

replace it with

factorial *= number;
}

Answer 2

Thank you, I tried that but now every answer is 0?

Answer 3

are you sure that the condition in your for loop is
number > 0?
I mean, may be you have number >=0 or something else.

Answer 4

Sorry, I have no clue what I did, but It worked thank you. Would you mind helping as well, when reading the code, I would imagine if number = 10, then why wouldn't the code do 9x8x7... Since the loop says to do -1 each time?

Answer 5

Adamjhw that's exactly what your code does.

if number=10 then your code will calculate

10x9x8x...x1

it will start at 10 and end with 1 because 1-1=0 which will break the loop.

Answer 6

I know, but why doesnt the first one make it start at 9 rather than 10?

Answer 7

number is decreased only after the loop instructions have been executed.

so, on the first iteration, the loop will compare number to 0:
if number>0 then it will execute the loop body, here factorial *= number.
and then execute number-- and redo what is said above.

Answer 8

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

for (;number>0; number--){
factorial *= number}
console.log(factorial)
}

-----This might be a little easier to understand------------
function main() {
var i = parseInt(readLine(), 10)
var factorial = 1;
// Your code here

for (;i>0; i--){
factorial *= i}
console.log(factorial)
}

Answer 9

look at this

**
Statement 3 increases a value (i++) each time the code block in the loop has been executed.
**
from here

https://www.sololearn.com/learning/1140/