2.2 KiB
id, title, challengeType, videoUrl, forumTopicId
id | title | challengeType | videoUrl | forumTopicId |
---|---|---|---|---|
cf1111c1c12feddfaeb2bdef | Generate Random Whole Numbers within a Range | 1 | https://scrimba.com/c/cm83yu6 | 18187 |
--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;
}