You asked: How do you write a good comment in JavaScript?

How can you add a comment in a JavaScript and write example?

How to write comments in JavaScript

  1. Answer: Use the syntax “// text” and “/* text */” Comments in CSS are typically used to explain the purpose of the style rules declarations. …
  2. Single-line comments. JavaScript single line comment begins with // , See the example below: …
  3. Multi-line comments. …
  4. Related FAQ.

How do you write a good comment in code?

How to comment Code: Primarily, a single “block” comment should be placed at the top of the function (or file) and describe the purpose the code and any algorithms used to accomplish the goal. In-line comments should be used sparingly, only where the code is not “self-documenting”.

What is the use of comments in JavaScript?

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.

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How do you write comments in the HTML and JavaScript?

A single-line comment can appear anywhere on a line. To create a single-line comment, you type two forward slashes (//) and then the comment text. Here are examples of single-line comments. Each line begins with a double slash (//) to indicate that it’s a comment line.

Which is not correct way to write comment in JavaScript?

Multi-line comments start with /* and end with */ . Any text between /* and */ will be ignored by JavaScript.

What is the keyboard shortcut to comment multiple lines?

“Ctrl+/” just toggles selected text to a comment. If selected text spread across multiple lines, “Ctrl+/” toggles individual lines explicitly to comment instead of commenting out the entire block.

How do you write a good comment?

Get Better at Writing Comments

  1. Make an appropriate use of the comments.
  2. Respect the documentation standard of your language and of your team.
  3. Write useful comments, avoid garbage comments.
  4. Be clear about the purpose of the code (and not only the behavior)
  5. Describe how to use it and explain the limits of your code.

How much does it cost to comment code?

Three lines of comment for every line of code would not be excessive. For actual code, it would be much lower. I don’t agree with the extremists who think you should aim for zero comments, but certainly if you think you need comments you should first consider whether the code could be made clearer.

How do I comment in JSON?

JSON does not support comments. It was also never intended to be used for configuration files where comments would be needed. Hjson is a configuration file format for humans.

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How are comments written in Java?

The Java programming language has three kinds of comments:

  1. Traditional comments: The first five lines of the listing form one traditional comment. The comment begins with /* and ends with */. …
  2. End-of-line comments: The text //I? …
  3. Javadoc comments: A javadoc comment begins with a slash and two asterisks (/**).

How do you write notes in JavaScript?

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.

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