Hello coders, today we are going to solve Day 1: Functions HackerRank Solution which is a part of 10 Days of JavaScript Series.
Objective
Today, we’re discussing JavaScript functions. Check out the attached tutorial for more details.
Task
Implement a function named factorial that has one parameter: an integer, n. It must return the value of n! (i.e., n factorial).
Input Format
Locked stub code in the editor reads a single integer, n, from stdin and passes it to a function named factorial.
Constraints
- 1 <= n <= 10
Output Format
The function must return the value of n!.
Sample Input 0
4
Sample Output 0
24
Explanation 0
We return the value of 4! = 4 x 3 x 2 x 1 = 24.
Solution – Day 1: Functions
'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++]; } /* * Create the function factorial here */ function factorial(n) { if (n < 2){ return 1; } return n * factorial(n-1); } function main() { const n = +(readLine()); console.log(factorial(n)); }
Disclaimer: The above Problem (Functions) is generated by Hacker Rank but the Solution is provided by CodingBroz. This tutorial is only for Educational and Learning Purpose.