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Fix text inconsistency (#39203) 

* Fix text inconsistency

To match the eight ECMAScript Language Types on the previous paragraph.

Co-authored-by: moT01 <20648924+moT01@users.noreply.github.com>
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Bianca Zanardi 2020-07-09 16:18:11 +02:00 committed by GitHub
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curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/declare-javascript-variables.english.md
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@ -11,7 +11,7 @@ forumTopicId: 17556
<section id='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 <code>undefined</code>, <code>null</code>, <code>boolean</code>, <code>string</code>, <code>symbol</code>, <code>bigint</code>, <code>number</code>, and <code>object</code>.
For example, computers distinguish between numbers, such as the number <code>12</code>, and <code>strings</code>, such as <code>"12"</code>, <code>"dog"</code>, or <code>"123 cats"</code>, 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 seven data types may be stored in a variable.
<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.
<code>Variables</code> 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 <code>variables</code> 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 <code>var</code> in front of it, like so: