Day 0: Data Types

/**
 *   The variables 'firstInteger', 'firstDecimal', and 'firstString' are declared for you -- do not modify them.
 *   Print three lines:
 *   1. The sum of 'firstInteger' and the Number representation of 'secondInteger'.
 *   2. The sum of 'firstDecimal' and the Number representation of 'secondDecimal'.
 *   3. The concatenation of 'firstString' and 'secondString' ('firstString' must be first).
 *
 *	Parameter(s):
 *   secondInteger - The string representation of an integer.
 *   secondDecimal - The string representation of a floating-point number.
 *   secondString - A string consisting of one or more space-separated words.
 **/
function performOperation(secondInteger, secondDecimal, secondString) {
  // Declare a variable named 'firstInteger' and initialize with integer value 4.
  const firstInteger = 4;

  // Declare a variable named 'firstDecimal' and initialize with floating-point value 4.0.
  const firstDecimal = 4.0;

  // Declare a variable named 'firstString' and initialize with the string "HackerRank".
  const firstString = 'HackerRank ';

  // Write code that uses console.log to print the sum of the 'firstInteger' and 'secondInteger' (converted to a Number        type) on a new line.
  console.log(firstInteger + Number(secondInteger));

  // Write code that uses console.log to print the sum of 'firstDecimal' and 'secondDecimal' (converted to a Number            type) on a new line.
  console.log(firstDecimal + Number(secondDecimal));

  // Write code that uses console.log to print the concatenation of 'firstString' and 'secondString' on a new line. The        variable 'firstString' must be printed first.
  console.log((firstString || '').concat(secondString));
}