https://codeperfectplus.com/30-days-of-code-hackerrank-day-1

30_days_of_code_day_1_javascript.js

// Declare second integer, double, and String variables.
// Read and save an integer, double, and String to your variables.
var i2 = +(readLine());
var d2 = +(readLine());
var s2 = readLine();

// Print the sum of both integer variables on a new line.
console.log(i + i2);

// Print the sum of the double variables on a new line.
console.log((d + d2).toFixed(1));

// Concatenate and print the String variables on a new line
// The 's' variable above should be printed first.
console.log(s + s2);