freeCodeCamp/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/regular-expressions/match-all-numbers.english.md

---
id: 5d712346c441eddfaeb5bdef
title: Match All Numbers
challengeType: 1
---

## Description
<section id='description'>
You've learned shortcuts for common string patterns like alphanumerics. Another common pattern is looking for just digits or numbers.
The shortcut to look for digit characters is <code>\d</code>, with a lowercase <code>d</code>. This is equal to the character class <code>[0-9]</code>, which looks for a single character of any number between zero and nine.
</section>

## Instructions
<section id='instructions'>
Use the shorthand character class <code>\d</code> to count how many digits are in movie titles. Written out numbers ("six" instead of 6) do not count.
</section>

## Tests
<section id='tests'>

```yml
tests:
  - text: Your regex should use the shortcut character to match digit characters
    testString: 'assert(/\\d/.test(numRegex.source), "Your regex should use the shortcut character to match digit characters");'
  - text: Your regex should use the global flag.
    testString: 'assert(numRegex.global, "Your regex should use the global flag.");'
  - text: Your regex should find 1 digit in <code>"9"</code>.
    testString: 'assert("9".match(numRegex).length == 1, "Your regex should find 1 digit in <code>"9"</code>.");'
  - text: Your regex should find 2 digits in <code>"Catch 22"</code>.
    testString: 'assert("Catch 22".match(numRegex).length == 2, "Your regex should find 2 digits in <code>"Catch 22"</code>.");'
  - text: Your regex should find 3 digits in <code>"101 Dalmatians"</code>.
    testString: 'assert("101 Dalmatians".match(numRegex).length == 3, "Your regex should find 3 digits in <code>"101 Dalmatians"</code>.");'
  - text: 'Your regex should find no digits in <code>"One, Two, Three"</code>.'
    testString: 'assert("One, Two, Three".match(numRegex) == null, "Your regex should find no digits in <code>"One, Two, Three"</code>.");'
  - text: Your regex should find 2 digits in <code>"21 Jump Street"</code>.
    testString: 'assert("21 Jump Street".match(numRegex).length == 2, "Your regex should find 2 digits in <code>"21 Jump Street"</code>.");'
  - text: 'Your regex should find 4 digits in <code>"2001: A Space Odyssey"</code>.'
    testString: 'assert("2001: A Space Odyssey".match(numRegex).length == 4, "Your regex should find 4 digits in <code>"2001: A Space Odyssey"</code>.");'

```

</section>

## Challenge Seed
<section id='challengeSeed'>

<div id='js-seed'>

```js
let numString = "Your sandwich will be $5.00";
let numRegex = /change/; // Change this line
let result = numString.match(numRegex).length;
```

</div>



</section>

## Solution
<section id='solution'>

```js
// solution required
```
</section>