/* Multi-line comments */Allows you to add explanatory text to code. The comment begins with /* and ends with */. This type of comment can wrap over multiple lines.
/* */ (multiline comment)Multiline comments are used for large text descriptions of code or to comment out chunks of code while debugging applications. Comments are ignored by the compiler.
In single line comment only we can comment only 1 line words not much large words . Eg :- Hi , How are You ? etc . Multi line comment means we can comment many words at a time and can be commented differently too with different front style .
Single-line comments are created simply by beginning a line with the hash (#) character, and they are automatically terminated by the end of line. Comments that span multiple lines – used to explain things in more detail – are created by adding a delimiter (“””) on each end of the comment.
A comment starts with a slash asterisk /* and ends with a asterisk slash */ and can be anywhere in your program. Comments can span several lines within your C program. Comments are typically added directly above the related C source code.
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.
In Python script, the symbol # indicates start of comment line. It is effective till the end of line in the editor. If # is the first character of line, then entire line is a comment. It can be used in the middle of a line.
One way to do it would be:
- Select the text, Press CTRL + K , C to comment ( CTRL + E + C )
- Move the cursor to the first line after the delimiter // and before the Code text.
- Press Alt + Shift and use arrow keys to make selection.
- Once the selection is done, press space bar to enter a single space.
6 Answers
- Single line comment. Ctrl + 1.
- Multi-line comment select the lines to be commented. Ctrl + 4.
- Unblock Multi-line comment. Ctrl + 5.
Simply position your cursor at a point in your code, then press and hold SHIFT and ALT. Next, press the up or down arrow to select the lines you want to edit. When you begin typing you will behold a gift from the gods – editing multiple lines at once!
In visual studio, we can use the following keyboard shortcuts to comment/uncomment the selected lines of code based on our requirements. To comment keyboard shortcut is Ctrl + K, C and to uncomment keyboard shortcut is Ctrl + K, U .
The BasicsThe most basic shortcut for creating a comment is Ctrl+K, Ctrl+C.
(programming, transitive) To disable a section of source code by converting it into a comment. If you do not want to run this line of code, just comment it out!
All you need to do is select the block of code and type ctrl+1. You should be all set! To make the comment of a block, it is a sequence of keys: Ctrl-K + Ctrl+C and to un-comment Ctrl-K + Ctrl-U .
So far we have seen single line comments, but HTML supports multi-line comments as well. 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 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".
To add a comment
- press Ctrl+Alt+C twice.
- or select 'Comment code' from your context menu.
- or insert /** above the line of code.
If you want to comment in render block where we use JSX you need to use the 2nd method. 2) If you want to comment something in JSX you need to use JavaScript comments inside of Curly braces like {/comment here/}. It is a regular /* Block Comments */, but need to be wrapped in curly braces. Ctrl + / on Windows + Linux.
Unlike most of the programming languages, Bash doesn't support multiline comments. The simplest way to write multiline comments in Bash is to add single comments one after another: # This is the first line. # This is the second line.
For single line comment you can use Ctrl + / and for multiple line comment you can use Ctrl + Shift + / after selecting the lines you want to comment in java editor.
Multi-line Comments in Python – Key Takeaways
- Unlike other programming languages Python doesn't support multi-line comment blocks out of the box.
- The recommended way to comment out multiple lines of code in Python is to use consecutive # single-line comments.
The second line begins with a special symbol: # . This marks the line as a comment, and it is ignored completely by the shell. The only exception is when the very first line of the file starts with #! as ours does. This is a special directive which Unix treats specially.
To comment out blocks in vim:
- press Esc (to leave editing or other mode)
- hit ctrl + v (visual block mode)
- use the ↑ / ↓ arrow keys to select lines you want (it won't highlight everything - it's OK!)
- Shift + i (capital I)
- insert the text you want, e.g. %
- press Esc Esc.
- REM must be followed by a space or tab character, then the comment.
- If ECHO is ON, the comment is displayed.
- You can also place a comment in a batch file by starting the comment line with two colons [::].
- You can use REM to create a zero-byte file if you use a redirection symbol immediately after the REM command.
Commenting and uncommenting blocks of code?
- On the main menu, choose Code | Comment with Block Comment.
- Press Ctrl+Shift+/ .
In Python script, the symbol # indicates start of comment line. A triple quoted multi-line string is also treated as comment if it is not a docstring of a function or class.
In Vim:
- go to first line of block you want to comment.
- shift-V (enter visual mode), up down highlight lines in block.
- execute the following on selection :s/^/#/
- the command will look like this: :'<,'>s/^/#
- hit enter.
