Why use comments in JavaScript programs?

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.

Why do we need to use comments in programs?

Commenting involves placing Human Readable Descriptions inside of computer programs detailing what the Code is doing. Proper use of commenting can make code maintenance much easier, as well as helping make finding bugs faster. Further, commenting is very important when writing functions that other people will use.

Should you comment JavaScript?

Commenting out code should only be done during testing purposes. Do not leave snippets of commented out code in your final script. The computer interprets the JavaScript code, but other developers will always read it, as well as for yourself in the future.

THIS IS IMPORTANT:  Where do we use SQL in testing?

Are comments in code good?

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.

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 a multi line comment in Java?

Multi line comments in Java start with /* and end with */. You can comment multiple lines just by placing them between /* and */.

What are some uses for 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.

How do you write a good comment?

Top ten tips for writing a great comment

  1. Read the article. …
  2. Respond to the article. …
  3. Read the other comments. …
  4. Make it clear who you’re replying to. …
  5. Use the return key. …
  6. Avoid sarcasm. …
  7. Avoid unnecessary acronyms. …
  8. Use facts.

What are the two types of comments in JavaScript?

There are two types of comments in JavaScript: single-line and multi-line. Comments can be used to explain or hide the code so it is not executed.

THIS IS IMPORTANT:  Your question: How many SQL user CALs do I need?

When you use multiple line JavaScript comments you need to be careful to them?

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

Is it bad to comment 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 You Should not comment code?

Removing commented code not only makes it harder to find later, but it also makes it so people in the future don’t know it existed before. For finding the code, there are tools and git commands to help you look at the history of a file.

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.

Categories PHP