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

id	title	challengeType
56533eb9ac21ba0edf2244ac	Increment a Number with JavaScript	1

Description

You can easily increment or add one to a variable 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. Hint
Learn more about Arithmetic operators - Increment (++).

Tests

tests:
  - text: <code>myVar</code> should equal <code>88</code>
    testString: 'assert(myVar === 88, "<code>myVar</code> should equal <code>88</code>");'
  - text: <code>myVar = myVar + 1;</code> should be changed
    testString: 'assert(/var\s*myVar\s*=\s*87;\s*\/*.*\s*([+]{2}\s*myVar|myVar\s*[+]{2});/.test(code), "<code>myVar = myVar + 1;</code> should be changed");'
  - text: Use the <code>++</code> operator
    testString: 'assert(/[+]{2}\s*myVar|myVar\s*[+]{2}/.test(code), "Use the <code>++</code> operator");'
  - text: Do not change code above the line
    testString: 'assert(/var myVar = 87;/.test(code), "Do not change code above the line");'

Challenge Seed

var myVar = 87;

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

After Test

console.info('after the test');

Solution

var myVar = 87;
myVar++;