let myArray = [];

function calculateFactorial (myFacNumber)
{
  
   let result = 1;
   let c; 

  for(let x = 1; x<=myFacNumber; x++)
  {
     for(let j = x; j<=x;j++)
     {
       c= myArray[j] = x;
       result *= c;
     }
  }
 return result; 
}
console.log(calculateFactorial(5));