You may encounter situations, when a block of code needs to be executed several number of times. In general, statements are executed sequentially i.e. The first statement in a function is executed first, followed by the second, and so on. But in our programs, there may be a need of doing repetitive work which can be easily done with the help of loops.
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Switch case in JavaScript
The switch case is an alternative of if…else statement which does almost the same thing. The switch case statement tests a variable against a series of values until it finds its match.
If-else or conditional statements in JavaScript
When you write a code for developing your web page, you may have the situations where you want to handle some statements of your code with some conditions.
JavaScript Operators
Operators are the basic building blocks of any programming language. Like other programming languages, JavaScript also has built in operators which are used to make number calculations, assign values etc. These are the symbols which tell the JavaScript engine to perform calculations like addition, subtraction, division, multiplication, assigning vales to the variables.
JavaScript Data types
Data types are the basic building blocks of any programming language. Like other computer languages, JavaScript has built in data types which are used to build your program. Data types specify what type of data can be stored in your program.
Generating JavaScript Outputs
There are certain situations where you want to generate output of your program as per your requirement. Sometime, you might want to see the value of variable, or write a message to browser console to help you debug an issue in your running JavaScript code, and so on.
JavaScript variables
A variable is fundamental for any language. Like C, C++ and other programming language JavaScript also allow you to declare variables. A variable is nothing but a storage which holds your data. It can be simply compared with containers in your house’s kitchen which are used to store different items.
JavaScript syntax
The syntax of JavaScript is the set of rules that defines correctly structured JavaScript program. The statements which JavaScript program consists are placed inside HTML tags. The JavaScript file is saved with a.js extension.
Embedding JavaScript in HTML
A web page cane be structured with the help of HTML and beautified with the help of CSS. By using HTML and CSS only, you can only structure your web page but cannot make calculations on your web page. In order to make your page calculative, you have to embed JavaScript in your code.
JavaScript Programming Language
JavaScript is the most popular and widely used client-side scripting language. Client-side scripting refers to scripts that run within your web browser. JavaScript is designed to add interactivity and dynamic effects to the web pages by manipulating the content returned from a web server.
CSS z-index property
The CSS z-index property specifies the layering or stacking of positioned elements. In other words, z-index value decides which layer has to be shown in front and in back. The element having higher z-index value will be shown in front as compared to elements having lower z-index values.