freeCodeCamp/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/modify-array-data-with-indexes.md

id, title, challengeType, videoUrl, forumTopicId

id	title	challengeType	videoUrl	forumTopicId
cf1111c1c11feddfaeb8bdef	Modify Array Data With Indexes	1	https://scrimba.com/c/czQM4A8	18241

--description--

Unlike strings, the entries of arrays are mutable and can be changed freely.

Example

var ourArray = [50,40,30];
ourArray[0] = 15; // equals [15,40,30]

Note
There shouldn't be any spaces between the array name and the square brackets, like array [0]. Although JavaScript is able to process this correctly, this may confuse other programmers reading your code.

--instructions--

Modify the data stored at index 0 of myArray to a value of 45.

--hints--

myArray should now be [45,64,99].

assert(
  (function () {
    if (
      typeof myArray != 'undefined' &&
      myArray[0] == 45 &&
      myArray[1] == 64 &&
      myArray[2] == 99
    ) {
      return true;
    } else {
      return false;
    }
  })()
);

You should be using correct index to modify the value in myArray.

assert(
  (function () {
    if (code.match(/myArray\[0\]\s*=\s*/g)) {
      return true;
    } else {
      return false;
    }
  })()
);

--seed--

--after-user-code--

if(typeof myArray !== "undefined"){(function(){return myArray;})();}

--seed-contents--

// Setup
var myArray = [18,64,99];

// Only change code below this line

--solutions--

var myArray = [18,64,99];
myArray[0] = 45;