Question

How to calculate factorial of a number using recursion in JavaScript

Answer 1

function factorial(x) {
    if (x == 0) {
        return 1;
    }
    else {
        return x * factorial(x - 1);
    }
}

const n = 5

const fact = factorial(n);
    
console.log(fact);
  
    

    
/*
run:
    
120
    
*/

 

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Answer 2

function factorial(x) {
   return (x == 1 || x == 0) ? 1 : x * factorial(x - 1);
}
 
const n = 5
 
const fact = factorial(n);
     
console.log(fact);
   
   
     
     
/*
run:
     
120
     
*/

 

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