2.3 KiB

Raw Blame History

id	title	challengeType	videoUrl	forumTopicId	dashedName
cf1111c1c12feddfaeb2bdef	Generate Random Whole Numbers within a Range	1	https://scrimba.com/c/cm83yu6	18187	generate-random-whole-numbers-within-a-range

--description--

Instead of generating a random whole number between zero and a given number like we did before, we can generate a random whole number that falls within a range of two specific numbers.

To do this, we'll define a minimum number min and a maximum number max.

Here's the formula we'll use. Take a moment to read it and try to understand what this code is doing:

Math.floor(Math.random() * (max - min + 1)) + min

--instructions--

Create a function called randomRange that takes a range myMin and myMax and returns a random whole number that's greater than or equal to myMin, and is less than or equal to myMax, inclusive.

--hints--

The lowest random number that can be generated by randomRange should be equal to your minimum number, myMin.

assert(calcMin === 5);

The highest random number that can be generated by randomRange should be equal to your maximum number, myMax.

assert(calcMax === 15);

The random number generated by randomRange should be an integer, not a decimal.

assert(randomRange(0, 1) % 1 === 0);

randomRange should use both myMax and myMin, and return a random number in your range.

assert(
  (function () {
    if (
      code.match(/myMax/g).length > 1 &&
      code.match(/myMin/g).length > 2 &&
      code.match(/Math.floor/g) &&
      code.match(/Math.random/g)
    ) {
      return true;
    } else {
      return false;
    }
  })()
);

--seed--

--after-user-code--

var calcMin = 100;
var calcMax = -100;
for(var i = 0; i < 100; i++) {
  var result = randomRange(5,15);
  calcMin = Math.min(calcMin, result);
  calcMax = Math.max(calcMax, result);
}
(function(){
  if(typeof myRandom === 'number') {
    return "myRandom = " + myRandom;
  } else {
    return "myRandom undefined";
  }
})()

--seed-contents--

function randomRange(myMin, myMax) {
  // Only change code below this line
  return 0;
  // Only change code above this line
}

--solutions--

function randomRange(myMin, myMax) {
  return Math.floor(Math.random() * (myMax - myMin + 1)) + myMin;
}

2.3 KiB Raw Blame History