You are provided with a number, "N". Find its factorial.

You are provided with a number, "N". Find its factorial.

Input Description:
A positive integer is provided as an input.

Output Description:
Print the factorial of the integer.

Sample Input :
2

Sample Output :
2

 const readline = require('readline');
 const inp = readline.createInterface({
  input: process.stdin
 });
 const userInput = [];
 inp.on("line", (data) => {
 userInput.push(data);
 });
 inp.on("close", () => {
 var data = userInput[0].split(" ");
 var a = parseInt(data[0]);
var factorial=1;
for(i=1;i<=a;i++)
  factorial=factorial*i;
 console.log(factorial)

 });