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.
Can Comments break code?
Too many times comments are just an excuse for writing bad code. Comments decay over time, which makes them wrong and misleading. They are true only when written, and even then they can’t be enforced efficiently. Over time, people will inevitably make logic changes, change types, and move things around.
Why You Should not comment code?
In reality, commented code is harmless. The problem is that it’s messy and makes it difficult to read. There are far worse sins but it’s a very simple thing to eliminate. As the person who commented out the code, you are in the best position to determine that it can be completely removed.
Why must you write comments before or while you write the program never after?
Having the comment appear before the code helps the reader have a context for the code they’re about to encounter. Much more humane than throwing the code at them and explaining after they’re already confused.
Why are comments useful?
Comments can be used to summarize code or to explain the programmer’s intent. According to this school of thought, restating the code in plain English is considered superfluous; the need to re-explain code may be a sign that it is too complex and should be rewritten, or that the naming is bad.
What is a good reason for you to add comments to your code?
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.
How do I add comments to my code?
In line comments are usually made using the “single line” commenting syntax of the language. You should add “in-line” comments wherever you think a little bit of English explanation would be useful to either yourself or someone else (like a TA) who is going to read your code.
How many comments should code have?
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.
Should I add comments to my code?
A handy rule of thumb is: a comment should only be added to answer a question that the code can’t. If you aren’t confused by what a piece of code is doing, but rather why it’s doing it at that moment, then a comment should be added.
Where do you add comments in Scratch Wiki?
Comments can be added anywhere in the Scripts Area the same way. A main use for comments is to explain how a script is working. An example is below: The comments are attached to the blocks with a line a pixel thick, theoretically making it hard to see on this wiki or anywhere else with a white background.
How to use comments in the block plugin?
To use comments in the blocks plugin, simply add add two slashes (//) after the block to be commented, and add the annotation after that. This syntax is derived from comments in most high-level languages. Comments in the Block Plugin look like: move (10) steps // This is a comment attached to a block.
What is an example of a comment on a wiki?
A main use for comments is to explain how a script is working. An example is below: The comments are attached to the blocks with a line a pixel thick, theoretically making it hard to see on this wiki or anywhere else with a white background.
What’s the purpose of the comment feature on scratch?
Another purpose of the comment feature is to provide some hidden info the user wishes to not share in the Notes and Credits. The two comment types. The top one is a mini comment and the bottom one is a full comment. Comments can be shaped in two ways — a full comment or a mini comment.
