In some cases we may need to complete a task in loop. To handle such situation, we have for loop in Javascript. For Loop Lets begin with an example to understand the need of “for loop” Example Lets print 1 to 10 Solution: <script> var num=1; console.log(num); num++ // incremented the value by 1 console.log(num); num++ // […]
Category: Javascript Basics
Javascript If Else Statement
Before proceeding further lets first understand why if else if statement requirement came? Lets consider the simple situation, login process. A user is only allowed to access web pages of a website, if the user has logged in with valid credentials. See in the above case, “if” logic is there. Logic for login is as […]
Javascript Assignment Operators
To better understand what is an assignment operator, lets re-think once again how do we declare a variable and set value to it? Read Article: Variable Declaration in Javascript Assignment Operator The symbol of assignment operator is = Example <script> var num=100; </script> In the above example, we have declared variable name num. It holds the […]
Javascript Arithmetic Operators
To perform arithmetic operations Javascript has operators that performs the task. Operators Addition Operator As the name says, arithmetic operator performs arithmetic operation. The symbol of addition operator is + Example <script> var num1=10; var num2=20; alert(num1+num2); </script> Output:30 Subtraction Operator Subtraction Operator performs subtraction operation. The symbol of subtraction operator is – Example <script> var num1=20; var num2=10; alert(num1-num2); </script> […]
Javascript Single Line Comment and Multiline Comments
Comments help us to keep note inside the script file which later on helps the coder what are the actual purpose of the code. What is a comment in Javascript? In javascript, comment is a hint text or note text a developer or coder include in the script file, so that it would help him […]
Javascript Different Types of Data Types
In previous chapter, we have learned by using identifier “var” we declare variable. By using assignment operator we assign data to the declared variable. Unlike Java, .Net, C# we do not require keyword to define the datatype. Javascript compiler can understand the datatype from the assigned value. Now the question is, what kind of data […]
Javascript Variable Declaration
Variables are essential for data storing in memory and utilising as per requirement. Variable is a container. In this container we can store data. Variable Declaration To declare a variable in javascript, we use identifier “var” followed with a name. Alike any programming language such as java, .net, c# etc. the statement must end with […]
Javascript An Introduction Tutorial for absolute Beginners
Javascript is a scripting language. Browser engine such as Chrome, Safari, Opera, Firefox etc. compile and runs javascript code. Javascript (JS) Javascript which is also denoted as JS is a client side scripting language. Which means, when ever we want client side data validation then only we should use javascript code. Example: If we want […]