First Factorial

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Question

Have the function FirstFactorial(num) take the num parameter being passed and return the factorial of it. For example: if num = 4, then your program should return (4 3 2 * 1) = 24. For the test cases, the range will be between 1 and 18 and the input will always be an integer.

Examples

Input: 8
Output: 40340

Input: 4
Output: 24
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Answer

function FirstFactorial(num) {
  if (num < 2) {
    return 1;
  }
  // code goes here
  return num * FirstFactorial(num - 1);
}
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