Factorial fun JavaScript

Question

The case:
A number's factorial is the product of all positive integers less than or equal to the number.
Write a program that takes a number as input and outputs its factorial to the console.

Sample Input
5

Sample Output
120

Explanation
5*4*3*2*1 = 120

My code:

function main() {
var number = parseInt(readLine(), 10)
var factorial = 1;
// controlle van sololearn

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

}

The out put is 0

But why?
What do I need to change to get the right number to show?

Answer 1

U make some mistakes.
U find the factorial but you didn't store in a variable. And u should print the factorial instead of number.

Corrected code:

var number = parseInt(prompt());
var factorial = 1;
for (; number >0; number--) {
factorial=number*factorial;
}
console.log (factorial);

Answer 2

number*factorial does nothing because the result is not saved in a variable. In addition you want to change the variable number which is used in the loop. This make no sense here. The solution looks i.e. like as follows:

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

Answer 3

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

Answer 4

function main() {
var number = parseInt(readLine(), 10)
var factorial = 1;

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

}

Answer 5

Help me!!!

Factorial
The factorial of a number N is equal to 1 * 2 * 3 * ... * N

For example, the factorial of 5 is 1* 2 * 3 * 4 * 5 = 120.

Create a program that takes a number from input and output the factorial of that number.

Use a for loop to make the calculation, and start the loop from the number 1.

//IS JAVA

Answer 6

using System;

public class Program
{
static void Main(string[] args)
{
int num = Convert.ToInt32(Console.ReadLine());

int result =1;

for (int i = 1; i <= num; i++)
{
result *= i;
}

Console.WriteLine( result);

}
}

Answer 7

I feel like I hacked CIA with this for loop setup:

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

for (var keeper=number;--number>0;){
keeper*=number;
}

console.log(keeper)
}

Answer 8

I'd like this variant

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

Answer 9

another possible solutions:

function main() {
var number = parseInt(readLine(), 10)
var factorial = 1;
// Your code here
for (var i=1;i<= number; i++) {
factorial = factorial*i;
}
console.log (factorial)
}

Answer 10

GUNASEKARA H.G.D.A.P. (CST18022) Hi Guna, would you please explain to me how you got this result?
I lost it after « number —) ». The factorial part is messing with my brain. How factorial came from 1 to whatever it became after this ?
Please help a lost soul lol

Answer 11

What da heel is Factoral Numbers????????????

Answer 12

function main() {
var number = parseInt(readLine(), 10)
var factorial = 1;

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

Good Luck

Answer 13

Hi guys,

I don't get why you are putting "number- -" on the code.

I did the exercise with the following code and actually got the right answer.
on the "number --" part I put "i ++".

Can someone please help me with that.

function main() {
var number = parseInt(readLine(), 10)
var factorial = 1;
var i = 1;
for(i ; i<= number; i++ ) {
factorial*=i;
}
console.log(factorial)
}