What is JavaScript?
As a programming language, javascript is very versatile. It is used to make websites dynamic and interactive, as well as create applications. It is also a great way to learn programming. It is a relatively lightweight language that doesn’t put much strain on your computer. You can even use it on mobile devices.
JS is also event-driven, which means that it can respond to events like keyboard input or web page input. It can also interact with the Document Object Model (DOM), which lets it change fonts, images, text and other elements on a webpage. It is one of the main programming languages that makes the internet what it is today.
Most people who are interested in learning to program begin with hypertext markup language (HTML) and cascading style sheets (CSS). Once they have a grasp of those two, many move on to javascript. JavaScript is the magic third element that makes a website or application dynamic. It is the most popular programming language on the internet, and for good reason.
When a javascript code snippet passes into the engine, it is parsed, which means that it is turned into a data structure. This data structure is then translated into machine code, which is a series of 0’s and 1’s that the computer understands. The engine then executes the code.
As the engine runs through the code line by line, it scans for variables and functions. Variables that don’t have a value are assigned a default value. For example, if the code snippet contains the variable name ‘name’ without a value, it will assign a value of undefined to that variable. As it continues to run the code, if it encounters a function, it will keep the entire function in memory and execute it.
If the code snippet contains an expression with an operand (a number, string or object) and a condition, it will evaluate that expression. If the expression is true, it will execute the first block of code; if it is false, it will execute the second block of code.
The language has a lot of commands and features to help developers write programs that are efficient and concise. For example, it has a number of operators, including plus, minus, multiply and divide. It also supports string manipulation, logical operations, comparisons and more. It also has a set of keywords that developers can use to shorten the code.
Some of the most important concepts to know when learning javascript are the language’s variables, functions and arrays. These are the building blocks of any javascript program. Using them correctly is what will give you the power to create complex and dynamic applications.