Factorial recursion in JavaScript

We are required to write a JavaScript function that computes the Factorial of a number n by making use of recursive approach.

Here, we are finding the factorial recursion and creating a custom function recursiceFactorial() −

const num = 9;
const recursiceFactorial = (num, res = 1) => {
   if(num){
      return recursiceFactorial(num-1, res * num);
   };
   return res;
};

Now, we will call the function and pass the value to find recursion −

console.log(recursiceFactorial(num));
console.log(recursiceFactorial(6));
console.log(recursiceFactorial(10));

Example

Let’s write the code for this function −

const num = 9;
const recursiceFactorial = (num, res = 1) => {
   if(num){
      return recursiceFactorial(num-1, res * num);
   };
   return res;
};
console.log(recursiceFactorial(num));
console.log(recursiceFactorial(6));
console.log(recursiceFactorial(10));
console.log(recursiceFactorial(5));
console.log(recursiceFactorial(13));

Output

Following is the output in the console −

362880
720
3628800
120
6227020800

AmitDiwan

Updated on: 14-Sep-2020

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