JS console lesson : recursive math

recursive_math.js

// get factorial of a given number
// ie. 4 = (4 * 3 * 2 * 1) = 24

  function factorial(x) {
   if(x==0) {
      return 1;
   }
   return x * fact(x-1);
  }
  
console.log(factorial(4)); //output 24


// testing for prime
function test_prime(n)
{

  if (n===1)
  {
    return false;
  }
  else if(n === 2)
  {
    return true;
  }else
  {
    for(var x = 2; x<n; x++)
    {
      if(n % x === 0)
      {
        return false;
      }
    }
    return true;  
  }
}

console.log(test_prime(37));