A detailed explanation of the function "randomInteger" using comments

random-number-explained.js

/*
* Function randomInteger:
* 
* Accepts two numbers, and returns a random integer
* between the min and max inclusive of both numbers
* 
* Example Usage:
* randomInteger(1, 10) =>   7
* randomInteger(1, 10) =>   3
* randomInteger(1, 10) =>   9
* randomInteger(50, 75) => 67
* randomInteger(50, 75) => 92
* randomInteger(50, 75) => 71
*/
function randomInteger(min, max) {

  // make the range variable equal the
  // the difference between the max
  // and the min, plus 1
  let range = max - min + 1;
  console.log("The range of the random number is: ", range);

  // create a floating point number that is between
  // the difference of the min and the max, this float
  // will need to be added to the min, so that it is at
  // least the min number or larger
  let randomFloatWithinRange = Math.random() * range;
  console.log("The random floating point number is: ", randomFloatWithinRange);

  // find the neaerst integer, whole number, that is smaller
  // than the calculated floating point number
  let nearestIntegerDown = Math.floor(randomFloatWithinRange);
  console.log("The nearest integer less than the floating point number is: ", nearestIntegerDown);
  
  // add the min number to the nearestIntegerDown so that the
  // result of the function is at least as large as the min
  // and up to the size of the max
  let finalResult = min + nearestIntegerDown;
  console.log("The final result is: ", finalResult);

  return finalResult;
}

console.log(randomInteger(1, 10));
console.log(randomInteger(1, 10));
console.log(randomInteger(50, 75));
console.log(randomInteger(50, 75));