freeCodeCamp/decrement-a-number-with-javascript.english.md at c2bbde95a314df738be94e462e3b21930d2c84e4

Files

Randell Dawson 3ec1fe8ea7 feat: add forumTopicId to challenge frontmatter [pre-existing]

This commit adds the pre-existing challenge guide topics in the
forum to the forntmatter of their challenge markdown files.

2019-08-05 22:14:37 +05:30

1.5 KiB

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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.

Tests

tests:
  - text: <code>myVar</code> should equal <code>10</code>
    testString: assert(myVar === 10);
  - text: <code>myVar = myVar - 1;</code> should be changed
    testString: assert(/var\s*myVar\s*=\s*11;\s*\/*.*\s*([-]{2}\s*myVar|myVar\s*[-]{2});/.test(code));
  - text: Use the <code>--</code> operator on <code>myVar</code>
    testString: assert(/[-]{2}\s*myVar|myVar\s*[-]{2}/.test(code));
  - text: Do not change code above the line
    testString: assert(/var myVar = 11;/.test(code));

Challenge Seed

var myVar = 11;

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

After Test

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

Solution

var myVar = 11;
myVar--;

1.5 KiB Raw Blame History