How do you comment out a block in Java?

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. On Mac/OS X you can use Cmd + / to comment out single lines or selected blocks.

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Likewise, how do you comment out something in Java?

Use // text when you want to comment a single line of code. Use /* text */ when you want to comment multiple lines of code. Use /** documentation */ when you would want to add some info about the program that can be used for automatic generation of program documentation.

Similarly, what are the three types of comments in Java? In Java there are three types of comments:

• Single – line comments.
• Multi – line comments.
• Documentation comments.

Also to know is, how do you comment out a block of code?

To block comment /* */ code:

1. In the C/C++ editor, select multiple line(s) of code to comment out.
2. To comment out multiple code lines right-click and select Source > Add Block Comment. ( CTRL+SHIFT+/ )
3. To uncomment multiple code lines right-click and select Source > Remove Block Comment. ( CTRL+SHIFT+ )

What does += mean in Java?

They perform the operation on the two operands before assigning the result to the first operand. The following are all possible assignment operator in java: 1. += (compound addition assignment operator) 2. -= (compound subtraction assignment operator) 3.

Related Question Answers

What is a Java comment?

Java Comments. The Java comments are the statements that are not executed by the compiler and interpreter. The comments can be used to provide information or explanation about the variable, method, class or any statement. It can also be used to hide program code.

What are the two types of comments in Java?

There are 3 types of comments in java.

• Single Line Comment(used to comment only one line)
• Multi Line Comment(used to comment multiple lines of code)
• Documentation Comment(used to create documentation API)

What is Java documentation comment?

Writing Javadoc Comments In general, Javadoc comments are any multi-line comments (" /** */ ") that are placed before class, field, or method declarations. They must begin with a slash and two stars, and they can include special tags to describe characteristics like method parameters or return values.

How do you comment multiple lines in Java?

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

What is single line comment?

Single-line comments allow narrative on only one line at a time. Single-line comments can begin in any column of a given line and end at a new line or carriage return. The // character sequence marks the text following it as a single-line comment.

What is final variable in Java?

final keyword in java. First of all, final is a non-access modifier applicable only to a variable, a method or a class. Following are different contexts where final is used. Final variables. When a variable is declared with final keyword, its value can't be modified, essentially, a constant.

What is a block comment?

Block comments delimit a region of source code which may span multiple lines or a part of a single line. This region is specified with a start delimiter and an end delimiter. Some programming languages (such as MATLAB) allow block comments to be recursively nested inside one another, but others (such as Java) do not.

How do you comment something out?

6 Answers. To comment out is to render a block of code inert by turning it into a comment. To uncomment something means to remove the characters that makes it a comment. The expression only makes sense if the comment contains something that would work as code, usually something that was commented out earlier.

How do you comment out?

Commenting out code

1. In the C/C++ editor, select multiple line(s) of code to comment out.
2. To comment out multiple code lines right-click and select Source > Add Block Comment. ( CTRL+SHIFT+/ )
3. To uncomment multiple code lines right-click and select Source > Remove Block Comment. ( CTRL+SHIFT+ )

How do you comment out something in C++?

Comments[edit]

1. Single-line comments (informally, C++ style), start with // and continue until the end of the line. If the last character in a comment line is a the comment will continue in the next line.
2. Multi-line comments (informally, C style), start with /* and end with */ .

How do I delete multiple comments in Java?

1) Open the java file in which comments are to be removed. 2) Press Ctrl+F if you are using windows, Cmd+F in Mac OS. 3) Select Regular Expressions in the Find Menu. 5) This action will remove all the comments -> Single Line as well as multiple line comments from the java file.

How do you comment on Webstorm?

To add or remove a block comment, do one of the following:

1. On the main menu, choose Code | Comment with Block Comment.
2. Press Ctrl+Shift+/ .

How do you comment out code in C?

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.

What is HTML comment?

HTML Comments. Comments are some text or code written in your code to give an explanation about the code, and not visible to the user. Comments which are used for HTML file are known as HTML comments. Anything written between these tags will be ignored by the browser, so comments will not be visible on the webpage.

What does comment out mean in coding?

comment-out. Verb. (third-person singular simple present comments out, present participle commenting out, simple past and past participle commented out) (programming) To temporarily disable a section of source code by converting it into a comment.

What is the shortcut to comment in Notepad ++?

In notepad++ I believe that the shortcut is CTRL + Q for commenting the code. You can go to Settings > Shortcut Mapper to change this to match your preference. The default for a block comment is CTRL + SHIFT + Q . So you can highlight the block of code then use this shortcut.

How do you comment multiple lines in Notepad ++?

Also CTRL + K works well in Notepad++ to comment. If you had existing comments in a long block you are commenting, CTRL + Q will uncomment your actual comments, where CTRL + K just add another level of // in front. CTRL + SHIFT + K removes a single line comment from the selection.

How do you comment in bulk in Python?

In Eclipse + PyDev, Python block commenting is similar to Eclipse Java block commenting; select the lines you want to comment and use Ctrl + / to comment. To uncomment a commented block, do the same thing. The only mechanism to comment out Python code (understood as code ignored by the interpreter) is the #.

What is the shortcut for comment in Python?

Simply highlight the region that you want to comment or uncomment, and go to the Format menu under which you have the option to Comment out Region (shortcut: Alt-3 ) or to Uncomment Region (shortcut: Alt-4 ).