How do I put comments in JavaScript?
Single line Javascript comments start with two forward slashes (//). All text after the two forward slashes until the end of a line makes up a comment, even when there are forward slashes in the commented text.
How can you add a comment in a JavaScript and write example?
Single line comments start with a double forward slash (//), but do not have an end tag. Any text that is written after (//) will be completely ignored by JavaScript and will not be executed or displayed by the browser. Example: // Write to element with ID of “line”.
Mar 30, 2016How do comments work in JavaScript?
How do you comment multiple lines in JavaScript?
Which symbol is used for comments in JavaScript?
How does one create a new object in JavaScript?
- Create a single object, using an object literal.
- Create a single object, with the keyword new .
- Define an object constructor, and then create objects of the constructed type.
- Create an object using Object.create() .
How do you block a java comment?
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.
How do you end a comment in HTML?
The HTML Comment Tag
— and end with –> . Don’t forget the exclamation mark at the start of the tag! But you don’t need to add it at the end. The tag surrounds any text or other HTML tag you want to comment out.
How do you create a variable in JavaScript?
Use the reserved keyword var to declare a variable in JavaScript. Syntax: var <variable-name>; var <variable-name> = <value>; A variable must have a unique name.
Which HTML element do we put the JavaScript?
Inside which HTML element do we put the JavaScript? Explanation: The <script> tag is used to contain javascript code.
What is the basic difference between JavaScript and Java?
Key differences between Java and JavaScript: Java is an OOP programming language while Java Script is an OOP scripting language. Java creates applications that run in a virtual machine or browser while JavaScript code is run on a browser only. Java code needs to be compiled while JavaScript code are all in text.
How do you start a comment in Python?
Comment Syntax
Comments in Python begin with a hash mark ( # ) and whitespace character and continue to the end of the line.
What is TypeScript language?
TypeScript is JavaScript with syntax for types. TypeScript is a strongly typed programming language that builds on JavaScript, giving you better tooling at any scale.
What is variable in JS?
A JavaScript variable is simply a name of storage location. There are two types of variables in JavaScript : local variable and global variable. There are some rules while declaring a JavaScript variable (also known as identifiers). Name must start with a letter (a to z or A to Z), underscore( _ ), or dollar( $ ) sign.
How do you comment out in C++?
You can comment out one or more lines of code in any C/C++ editor view. The leading characters // are added to the beginning of each line when commenting one or more lines of code. You can also block comment multiple lines of code using the characters /* */ .
How do you print in Java?
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There are following three methods to print the statements:
- print() Method.
- println() Method.
- printf() Method.
How do I change font in HTML?
To change font size in HTML, use the CSS font-size property. Set it to the value you want and place it inside a style attribute. Then add this style attribute to an HTML element, like a paragraph, heading, button, or span tag.
How do I put an image in HTML?
The HTML <img> tag is used to embed an image in a web page. Images are not technically inserted into a web page; images are linked to web pages. The <img> tag creates a holding space for the referenced image. The <img> tag is empty, it contains attributes only, and does not have a closing tag.
What are data types in JS?
- Boolean type.
- Null type.
- Undefined type.
- Number type.
- BigInt type.
- String type.
- Symbol type.
What are two ways to embed JavaScript into an HTML page?
- As statements and functions within a <SCRIPT> tag. …
- By specifying a file as the JavaScript source (rather than embedding the JavaScript in the HTML). …
- By specifying a JavaScript expression as the value for an HTML attribute.
How do I run a script in HTML?
To execute JavaScript in a browser you have two options — either put it inside a script element anywhere inside an HTML document, or put it inside an external JavaScript file (with a . js extension) and then reference that file inside the HTML document using an empty script element with a src attribute.