freeCodeCamp/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/decrement-a-number-with-javascript.md

id, title, challengeType, videoUrl, forumTopicId

id	title	challengeType	videoUrl	forumTopicId
56533eb9ac21ba0edf2244ad	Decrement a Number with JavaScript	1	https://scrimba.com/c/cM2KeS2	17558

--description--

You can easily decrement or decrease a variable by one with the -- operator.

i--;

is the equivalent of

i = i - 1;

Note
The entire line becomes i--;, eliminating the need for the equal sign.

--instructions--

Change the code to use the -- operator on myVar.

--hints--

myVar should equal 10.

assert(myVar === 10);

myVar = myVar - 1; should be changed.

assert(
  /var\s*myVar\s*=\s*11;\s*\/*.*\s*([-]{2}\s*myVar|myVar\s*[-]{2});/.test(code)
);

You should use the -- operator on myVar.

assert(/[-]{2}\s*myVar|myVar\s*[-]{2}/.test(code));

You should not change code above the specified comment.

assert(/var myVar = 11;/.test(code));

--seed--

--after-user-code--

(function(z){return 'myVar = ' + z;})(myVar);

--seed-contents--

var myVar = 11;

// Only change code below this line
myVar = myVar - 1;

--solutions--

var myVar = 11;
myVar--;