What are comments in JavaScript?

Comments are used to prevent the execution of statements. Comments are ignored while the compiler executes the code. Comments are user friendly as user can get explanations of code using comments. Return Value: During execution of code, comments are ignored.

What are the different ways of adding comments in JavaScript?

There are two types of comments in JavaScript.

• Single-line Comment.
• Multi-line Comment.

How do you comment out JavaScript in HTML?

To create a single line comment in JavaScript, you place two slashes “//” in front of the code or text you wish to have the JavaScript interpreter ignore. When you place these two slashes, all text to the right of them will be ignored, until the next line.

What are comments in HTML?

The HTML comment tag is used to add text to an HTML document without including that text in the Web page. Comments are used in the following ways: Documenting your code. Comments are useful in documenting your Web page or ION Script application, and can help clarify your ION Script code for you and other developers.

How important are JavaScript comments?

Comments in JavaScript are used to explain the code and make the program more readable for developers. In programming, comments can also be used to prevent some code lines from being executed. This is useful when testing. Multi-line comments are more often used for formal documentations.

How do you insert a comment with more than one line?

To comment more than one line:

1. Select all the lines that you would like to be commented.
2. Press Ctrl + / Two slashes “//” will be added to the front of each line, causing them to be recognized as a comment.

How do you add notes in HTML and CSS?

To write HTML comments put — and —> at either end of the comment. HTML comments are notes to keep HTML code organized and are ignored by the browser.

How many types of HTML comments are there?

Types of HTML Comments: There are three types of comments in HTML which are: Single-line comment. Multi-lines comment. Using tag.

What is comment in HTML explain with syntax?

Definition and Usage The comment tag is used to insert comments in the source code. Comments are not displayed in the browsers. You can use comments to explain your code, which can help you when you edit the source code at a later date. This is especially useful if you have a lot of code.

Which is an advantage of comments in JavaScript?

Advantage of javaScript comments. Single-line and Multi-line comments. The JavaScript comments are meaningful way to deliver message. It is used to add information about the code, warnings or suggestions so that end user can easily interpret the code. The JavaScript comment is ignored by the JavaScript engine i.e. embedded in the browser.

What’s the difference between HTML and JavaScript on the web?

HTML is the most basic building block of the Web. It defines the meaning and structure of web content. JavaScript is an advanced programming language that makes web pages more interactive and dynamic. HTML is a standard markup language that provides the primary structure of a website.

Can you use HTML comments in a CSS file?

To help break up your section, you can use CSS Comments. As with HTML Comments, they are contained between two ‘tags’. They aren’t tags in the sense of HTML but it is important to notice that you need both parts. or inside your .css file. The same warning applies to CSS Comments as their HTML Counterparts – always close them!

Why are comments not displayed in the browser?

HTML comments are not displayed in the browser, but they can help document your HTML source code. Notice that there is an exclamation point (!) in the start tag, but not in the end tag.