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In this article, the editor introduces in detail "what is the meaning of variables in javascript", the content is detailed, the steps are clear, and the details are handled properly. I hope that this article "what is the meaning of variables in javascript" can help you solve your doubts.

A container in javascript where variables are used to store data, and can be used to store values and expressions. Variables must start with a letter, and variable names are case-sensitive.

This article operating environment: windows10 system, javascript 1.8.5, thinkpad T480 computer.

Variables are "containers" used to store data. Like algebra, the JavaScript variable can be used to store values (such as XForm5) and expressions (such as z=x+y).

Variables can use short names such as x and y, or they can use more descriptive names.

Note:

Variables must start with a letter

Variables can also start with the $and _ symbols (although we do not recommend this)

Variable names are case-sensitive (y and Y are different variables)

What is the role of JavaScript? 1, can embed dynamic text in HTML pages.

2. Respond to browser events.

3. Read and write HTML elements.

4. Verify the data before it is submitted to the server.

5. Detect the browser information of visitors.

6. Control cookies, including creation and modification, etc.

7. Server-side programming based on Node.js technology.

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