chore: import upstream snapshot with attribution

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+---
+id: bd7123c9c443eddfaeb5bdef
+title: Declare JavaScript Variables
+challengeType: 1
+forumTopicId: 17556
+dashedName: declare-javascript-variables
+---
+
+# --description--
+
+In computer science, <dfn>data</dfn> is anything that is meaningful to the computer. JavaScript provides eight different <dfn>data types</dfn> which are `undefined`, `null`, `boolean`, `string`, `symbol`, `bigint`, `number`, and `object`.
+
+For example, computers distinguish between numbers, such as the number `12`, and `strings`, such as `"12"`, `"dog"`, or `"123 cats"`, which are collections of characters. Computers can perform mathematical operations on a number, but not on a string.
+
+<dfn>Variables</dfn> allow computers to store and manipulate data in a dynamic fashion. They do this by using a "label" to point to the data rather than using the data itself. Any of the eight data types may be stored in a variable.
+
+Variables are similar to the x and y variables you use in mathematics, which means they're a simple name to represent the data we want to refer to. Computer variables differ from mathematical variables in that they can store different values at different times.
+
+We tell JavaScript to create or <dfn>declare</dfn> a variable by putting the keyword `var` in front of it, like so:
+
+```js
+var ourName;
+```
+
+creates a variable called `ourName`. In JavaScript we end statements with semicolons. Variable names can be made up of numbers, letters, and `$` or `_`, but may not contain spaces or start with a number.
+
+# --instructions--
+
+Use the `var` keyword to create a variable called `myName`.
+
+**Hint**  
+Look at the `ourName` example above if you get stuck.
+
+# --hints--
+
+You should declare `myName` with the `var` keyword, ending with a semicolon
+
+```js
+assert(/var\s+myName\s*;/.test(__helpers.removeJSComments(code)));
+```
+
+# --seed--
+
+## --seed-contents--
+
+```js
+
+```
+
+# --solutions--
+
+```js
+var myName;
+```