In computer programming, a comment is a programmer-readable explanation or annotation in the source code of a computer program. They are added with the purpose of making the source code easier for humans to understand, and are generally ignored by compilers and interpreters.
Similarly, How do you write comment 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”.
Additionally, When should you comment code? You should comment wherever you can – put comments that explain what you’re doing, and if you’re doing something tricky or unique be sure to explain that, as well. A good goal is to have 1 comment for every 1-4 lines of code.
Are comments in code necessary?
Good comments compliment your code, while bad ones pull readers away from the main points. Before putting any comments, ask yourself whether it would serve any purposes rather than distract people from comprehending your program. Good codes have rhythm while mediocre codes have a lot of pauses.
What is role of comments in programming language?
Comments are used in a programming language to document the program and remind programmers of what tricky things they just did with the code, or to warn later generations of programmers stuck with maintaining some spaghetti code.
How do you write comments in HTML?
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 do you comment HTML code?
An HTML comment begins with <! –– and the comment closes with ––> . HTML comments are visible to anyone that views the page source code, but are not rendered when the HTML document is rendered by a browser.
How do you comment effectively in code?
13 Tips to Comment Your Code
- Comment each level. Comment each code block, using a uniform approach for each level. …
- Use paragraph comments. …
- Align comments in consecutive lines. …
- Don’t insult the reader’s intelligence. …
- Be polite. …
- Get to the point. …
- Use a consistent style. …
- Use special tags for internal use.
Should you comment every method?
Every class and method should be preceded with a descriptive comment using the “JavaDoc” notational convention. … In the method, the comment should describe its purpose, comment all arguments, the return value, and any exceptions using JavaDoc keywords.
What’s best practice regarding putting comments in your code?
Here are some rules to help you achieve a happy medium:
- Rule 1: Comments should not duplicate the code.
- Rule 2: Good comments do not excuse unclear code.
- Rule 3: If you can’t write a clear comment, there may be a problem with the code.
- Rule 4: Comments should dispel confusion, not cause it.
Are comments bad in code?
Commenting code is on the generally-recognized list of code smells. But unlike most of the others on the list, comments are not always bad. Generally speaking, you should strive to minimize comments and let the code speak for itself, but it is just as important to include comments when the code cannot.
Why is it bad to comment out code?
Having commented out code stops the flow of your eyes as you go down the code – there is a distraction and you want to know what it is. Even more time is then wasted trying to work out why the code was commented out and whether it might still be useful or not.
Why we should never use HTML comments?
What are the negatives of HTML comments? worsens the UX – even not visible, the HTML comments are part of the DOM tree and increase the number of DOM elements. This, in turn, affects the quickness and responsiveness, also leads to slower CSS selectors and DOM manipulation.
What is the role of comments in a program in Python?
A Python comment is a line of text in a program that is not executed by the interpreter. Comments are used during debugging to identify issues and to explain code. Comments start with a hash character (#).
What is the use of comments?
Comments are text notes added to the program to provide explanatory information about the source code. They are used in a programming language to document the program and remind programmers of what tricky things they just did with the code and also helps the later generation for understanding and maintenance of code.
What is the role of comments and indentation in a program?
Commends describe the function of the code Whereas indents are spaces at the beginning of statements. They demonstrate program logically.
How do you comment or code in HTML?
Comment Code Block Ctrl+K+C/Ctrl+K+U
If you select a block of code and use the key sequence Ctrl+K+C, you’ll comment out the section of code. Ctrl+K+U will uncomment the code.
How do you comment out a single line in HTML?
For this reason, use the following simple rule to compose valid and accepted comments: An HTML comment begins with ” <! — “, ends with ” –> ” and does not contain ” — ” or ” > ” anywhere in the comment.
How do you comment multiple lines in HTML?
Multiline Comments
You can comment multiple lines by the special beginning tag <! — and ending tag –> placed before the first line and end of the last line as shown in the given example below.
How do you write a good comment?
Get Better at Writing Comments
- Make an appropriate use of the comments.
- Respect the documentation standard of your language and of your team.
- Write useful comments, avoid garbage comments.
- Be clear about the purpose of the code (and not only the behavior)
- Describe how to use it and explain the limits of your code.
Should you comment every line of code?
You should write a comment on every line of code.
What is the best way to comment out a section of code that contains comments?
You can easily add comments using either the C or C++ style, even to large sections of code. You can add two forward slash characters ( // ) at the beginning of lines to comment out large sections, even when they have other comment characters, such as /* */ .
What is the correct way to comment out in HTML?
HTML comment Tag: Main Tips
- The <! — –> is an HTML comment tag.
- To comment out in HTML, insert information between <! — and –> tags (browsers won’t show these notes).
- Commenting in HTML allows developers to leave notes about their code, its functionality or to indicate necessary changes for the future.