Question: How Many Single Line Commenting Types Are There?

Is PHP front or back end?

PHP is a back end development language only.

PHP belongs to the LAMP stack, which stands for Linux, Apache, MySQL, and PHP/Perl/Python.

To develop a web app with this technology stack, a software engineer needs to know four different syntax systems, as well as HTML and CSS..

How many single line commenting types are there PHP?

two typesPHP Comment Syntax: Single Line Comment While there is only one type of comment in HTML, PHP has two types.

What are single line comments?

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. Here’s an example.

What is the difference between $variable 1 and $variable == 1?

With the exception of constants, all PHP variables must begin with $ . A variable holds a value that can be a string, a number, or other data. $variable = 1 is an assignment statement, whereas $variable == 1 is a comparison operator. … Use $variable == 1 to find out later in the program whether $variable equals 1 .

What is PHP full form?

PHP is an acronym for “PHP: Hypertext Preprocessor” PHP is a widely-used, open source scripting language. PHP scripts are executed on the server.

What is the purpose of using a variable?

Variables are used to store information to be referenced and manipulated in a computer program. They also provide a way of labeling data with a descriptive name, so our programs can be understood more clearly by the reader and ourselves.

What is single line comment in Java?

Single-line comments start with two forward slashes ( // ). … Any text between // and the end of the line is ignored by Java (will not be executed).

How many types of comments are there in Python?

three kindsPython provides three kinds of comments including block comment, inline comment, and documentation string.

What is the full form of Java?

24/08/2015. Java does not have any full form, but a programming language originally developed by James Gosling at Sun Microsystems in 1995. The developers of Java were drinking coffee while they were deciding the name of their programming language. So, they gave it the name “Java” as a slang of “Coffee”. 1.

What two mathematical operators are valid for strings?

OperatorsArithmetic Operators are used to perform mathematical calculations.Assignment Operators are used to assign a value to a property or variable. … Comparison Operators are used to perform comparisons.Concatenation Operators are used to combine strings.More items…

What are the two types of comment?

In C/C++ there are two types of comments : Single line comment. Multi-line comment.

What are 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 many types of comment are there?

Seven types of comments emerge: directive, evaluative, advisory, interpretive, descriptive, directive questions (Socratic), and open-ended questions (discovery). The comments of beginners tended to be directive, evaluative, and/or advisory.

Which operator is used to assign a value to a variable?

The most common form of statement in a program uses the assignment operator, =, and either an expression or a constant to assign a value to a variable: variable = expression; variable = constant; The symbol of the assignment operator looks like the mathematical equality operator but in C++ its meaning is different.

What are comments?

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.

What is 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.

What is the sign used at the beginning of single line comment?

The single line comment is //. Everything from the // to the end of the line is a comment. To mark an entire region as a comment, use /* to start the comment and */ to end the comment.

What are the three types of comments?

Types of Comments in JavaSingle-line Comments. As the name suggests, it is for the beginners and is in a single line Java comments. … Multi-line Comments. … Documentation Comments.

What is the old name of PHP?

Personal Home PageIt was originally created by Danish-Canadian programmer Rasmus Lerdorf in 1994. The PHP reference implementation is now produced by The PHP Group. PHP originally stood for Personal Home Page, but it now stands for the recursive initialism PHP: Hypertext Preprocessor.

What can we use to comment a single line?

// Single-line comments Allows you to add explanatory text to code. The comment begins with a double slash (//) and ends at a newline character (\n), a carriage return (\r), or the end of the file.

Which of the following is used for single line comment?

/* */ can also be use to comment just a single line although it is used for paragraphs. // and # are used only for single line comment.