Javascript Comment
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Michael Zippo
04.11.2021
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JavaScript comments are used to write notes in code or to disable sections of code without deleting them. Comments are made in JavaScript by appending // before a single line or / * before and * / after multiple lines.
Commenting on code is a fundamental feature of many programming languages. The idea behind code comments is that while your code will be read by the computer, your code will also be read by humans, so it’s important that it’s easy for people to understand the code you write.
Comments allow you to keep track of your code while programming and give you the opportunity to take notes that may be useful in the future. Also, if you are working in a team, writing comments will help ensure that your code is readable for anyone who may need to contribute to your work.
In this tutorial, we will discuss how to write comments in JavaScript. We’ll start by discussing the value of comments in JavaScript, and then take a look at the syntax you can use to write comments in JavaScript.
Comments Writing About Code
About the subject is an essential part of writing code readable and manageable. The truth is, if you can understand the code you are writing today, there is no guarantee that you will be able to effectively describe what it does tomorrow. Also, if you are working with other people, it is very likely that they do not understand some of the code you are writing.
is where comments come in. Comments are statements that are ignored by the compiler and can be used to explain your JavaScript code.
As a developer, writing comments on your code will allow you to more effectively track what you are doing. As you write your code, you can write notes that will help you understand your code better and understand the intent behind the code you wrote earlier. Write comments will also be useful for other people who might see your code, as the comment will probably help them understand how your code works in more depth.
Each Developer writes comments differently , but the general rule is that comments should be used to explain the intent behind your code. After all, your code speaks for itself, but the reasons for writing the code a certain way often do not. therefore, by writing comments, you can explain why you approached a problem in a certain way, which makes it easier for you and others to understand how your program works later on.
JavaScript comments
There are two types of comments used in JavaScript:. Single line comments and block comments
Single line comments are written using two forward slashes (//) and are written on one line of code. Any character following "//" declaration will be ignored until the end of the line. Here is an example of a single line comment in JavaScript:
// This is a line comment
block are written with the opening and closing tags and allow you to write comments as multiple lines. The opening and closing tags for block comments are:
"/ *" to open a comment"* /" to close a comment
block comments are sometimes called multiline comments and look like multiline CSS comments. Here is an example of a block comment in JavaScript:
All code between our opening and closing tags will be ignored by the compiler.
Any kind of comment can be used to explain your code and discuss the intent behind your code. Here is an example of a comment to explain a basic variable declaration:
// Declare "chocolate" variables to store types of chocolate as an array
var chocolate = [’ Dark ’,’ Milk ’,’ White ’,’ hazelnuts’, ’Caramel’];
Comments in all programming languages ‚Äã‚Äãshould be updated frequently as code changes. So if we have decided that our variable name will be renamed "chocolate_types,‚" we need to update our comment to make sure it reflects the new variable name. In fact, programs get bigger, they often change significantly, so it’s important to update the comments as well as the code
Commenting the code
comments are often used for one of two purposes. the first, as we have discussed in this article, is to explain the intent behind your code and clear up any confusion. second is to prevent code execution during testing.
Commenting Code allows you to interrupt the execution of one line or more lines of code without completely removing the code from the program. Commenting is common when debugging, as you can try several solutions to a problem and save the code for later
Here is an example comment commenting out a line of code.
When we run our program, the compiler will run the line of code that declares the variable We commented out the "flavors" because it contains an error and we need to debug the problem. In this case, we forgot to put an equal sign between our variable name ("flavors") and the value of the variable (our flavor range).
Either break down each of the two types of comments we have discussed and explore how they can be used.
single line comments
single line comments , also known as inline comments, are used to comment out part of a line of code or a line full of code. Here is an example of a single line JavaScript comment:
In this comment we declare a "first_type" variable that stores the first value in our "chocolate" table . Next, we’ll add an inline comment at the end of our line to explain the intent behind our code.
Single line comments are typically used to make brief comments about your code or to describe the intent behind a specific line of code. However, single line comments are not the only type of comment you should use. If you need to explain a larger function, it is best to write block comments
bulk comments are written over multiple lines and are used to explain much of the code. Although single-line comments usually explain a line of code, a comment block can explain a function or the function of a file.
multi-lines start at the start of a function or file, in most Here is an example of a block comment used to explain a loop:
Our block comment spans t lines of re and is used to describe code written ten in our "for" loop.
Block comments can also be found at the beginning of a file to explain the purpose of a file or to include information about the author and version of the file. Here is an example of a snippet that includes the author of a file and the creation date in JavaScript:
Writing comments on the code allows you to write in a more readable and maintainable code. You can use comments to both keep track of your code for yourself in the future, and to make it easier for other people who work with your code to understand its purpose.
In this tutorial, we have discussed the basics of comments and then explored how to write a JavaScript comment. We’ve also discussed the two main types of comments - single-line and multi-line - and show examples of each type of comment code in action. Finally, we discussed the differences between comments and code comments .
We hope this article has helped you to resolve the problem. Apart from Javascript Comment, check other __del__-related topics.
