Love Calculator with JavaScript

// Love Calculator Practice by Saidur Rahman Setu (@srsetu)

// Names
var firstName = prompt("What is your Name?");
var secondName = prompt("What is partner Name?");

//Calculation
var n = Math.random();
n = n * 100;
n = Math.floor(n) + 1;

//Result in alert box
alert(firstName + " and " + secondName +"'s love percentage is: " + n + "%");