JavaScript(JS) JS find the factorial of a number

In JavaScript, you can find the factorial of a number using a loop. Here's an example:

function factorial(num) {
  let result = 1;
  for (let i = 2; i <= num; i++) {
    result *= i;
  }
  return result;
}

console.log(factorial(5)); // Output: 120

In the above example, we define a function called factorial that takes a number num as its argument. We initialize a variable called result to 1 and use a for loop to multiply result by the integers from 2 up to num. Once the loop finishes, we return the final value of result, which is the factorial of num.

We then call the factorial function with an argument of 5, which calculates the factorial of 5 using a loop and returns the value 120. You can replace the value of the argument with any other number to calculate its factorial using a loop.