freeCodeCamp/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/understanding-case-sensitivity-in-variables.md

id, title, challengeType, videoUrl, forumTopicId, dashedName

id	title	challengeType	videoUrl	forumTopicId	dashedName
56533eb9ac21ba0edf2244ab	Understanding Case Sensitivity in Variables	1	https://scrimba.com/c/cd6GDcD	18334	understanding-case-sensitivity-in-variables

--description--

In JavaScript all variables and function names are case sensitive. This means that capitalization matters.

MYVAR is not the same as MyVar nor myvar. It is possible to have multiple distinct variables with the same name but different casing. It is strongly recommended that for the sake of clarity, you do not use this language feature.

Best Practice

Write variable names in JavaScript in camelCase. In camelCase, multi-word variable names have the first word in lowercase and the first letter of each subsequent word is capitalized.

Examples:

var someVariable;
var anotherVariableName;
var thisVariableNameIsSoLong;

--instructions--

Modify the existing declarations and assignments so their names use camelCase.

Do not create any new variables.

--hints--

studlyCapVar should be defined and have a value of 10.

assert(typeof studlyCapVar !== 'undefined' && studlyCapVar === 10);

properCamelCase should be defined and have a value of the string A String.

assert(
  typeof properCamelCase !== 'undefined' && properCamelCase === 'A String'
);

titleCaseOver should be defined and have a value of 9000.

assert(typeof titleCaseOver !== 'undefined' && titleCaseOver === 9000);

studlyCapVar should use camelCase in both declaration and assignment sections.

assert(code.match(/studlyCapVar/g).length === 2);

properCamelCase should use camelCase in both declaration and assignment sections.

assert(code.match(/properCamelCase/g).length === 2);

titleCaseOver should use camelCase in both declaration and assignment sections.

assert(code.match(/titleCaseOver/g).length === 2);

--seed--

--seed-contents--

// Variable declarations
var StUdLyCapVaR;
var properCamelCase;
var TitleCaseOver;

// Variable assignments
STUDLYCAPVAR = 10;
PRoperCAmelCAse = "A String";
tITLEcASEoVER = 9000;

--solutions--

var studlyCapVar;
var properCamelCase;
var titleCaseOver;

studlyCapVar = 10;
properCamelCase = "A String";
titleCaseOver = 9000;