function || Js Hackerrank Solution

 Task

Implement a function named factorial that has one parameter: an integer, . It must return the value of

(i.e., factorial).

Input Format

Locked stub code in the editor reads a single integer, , from stdin and passes it to a function named

factorial.

Constraints

Output Format

The function must return the value of .

Sample Input 0

4

Sample Output 0

24

 

Solution:

'use strict';     process.stdin.resume();   process.stdin.setEncoding('utf-8');     let inputString = '';   let currentLine = 0;     process.stdin.on('data', inputStdin => {     inputString += inputStdin;   });      Process.stdin.on('end', _ => {     inputString = inputString.trim().split('\n').map(string => {         return string.trim();     });         main();      });     function readLine() {     return inputString[currentLine++];   }     function factorial(n){     if(n==0){         return 1;     }else{         return (n*factorial(n-1));     }       }     function main() {     const n = +(readLine());         console.log(factorial(n));   }