Comments in JavaScript are useful for adding human-readable explanations or annotations to your code, without affecting how the code is interpreted or executed by the computer. Comments are not executed as part of the program and are therefore ignored by the compiler or interpreter.
There are several reasons why comments are useful in JavaScript:
-
Explanations: Comments can be used to explain the purpose of a piece of code or how it works. This can help other developers who are working on the same codebase to understand the logic behind the code, making it easier for them to maintain and modify the code.
-
Debugging: Comments can also be used to temporarily disable a piece of code during debugging, without actually deleting the code. This makes it easy to isolate and identify the source of a bug.
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Documentation: Comments can also be used to automatically generate documentation for a codebase. Special tools can parse the comments in the code and use them to generate API documentation, user manuals, and other types of technical documentation.
Comments are an essential part of writing high-quality, maintainable code that is easy for others to understand and work with.
<!DOCTYPE html>
<html>
<head>
<script src="main.js"></script>
</head>
<body>
<script>
/*
document.write("Hack The Planet");
document.write("<br><br><br>");
document.write("Mess with the best, die like the rest");
*/
</script>
<script>
document.write("Hack The Planet");
//document.write("<br><br><br>");
//document.write("Mess with the best, die like the rest");
</script>
</body>
</html>
Comments in JavaScript are used to add descriptive or explanatory text within the code that is not executed by the browser or JavaScript engine. This helps to make the code more readable and understandable for other developers who may be working on the same project.
There are two types of comments in JavaScript:
- Single-line comment: This is used to comment on a single line of code. It starts with // and everything after that on the same line is considered a comment.
- Multi-line comment: This is used to comment on multiple lines of code. It starts with /* and ends with */. Everything between these two characters is considered a comment.
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