Day 1: Functions

 Objective

Today, we're discussing JavaScript functions. Check out the attached tutorial for more details.

Task

Implement a function named factorial that has one parameter: an integer, . It must return the value of  (i.e.,  factorial).

Input Format

Locked stub code in the editor reads a single integer, , from stdin and passes it to a function named factorial.

Constraints

• 1 ≤ n ≤ 10

Output Format

The function must return the value of .

Sample Input 0

4

Sample Output 0

24

Explanation 0

We return the value of  . 

Solution

function factorial(n){
    var a=1
    for(var i=1;i<=n;i++){
        a=a*i;
    }
return a;

}