JavaScript Variables JAVASCRIPT
- JavaScript Introduction
- JavaScript Syntax
- JavaScript innerHTML
- JavaScript document.write()
- Javascript - window.alert()
- JavaScript - console.log()
- JavaScript Comments
- JavaScript Variables
- JavaScript Operators
- JavaScript Data Types
- JavaScript Functions
- JavaScript Objects
- JavaScript Events
- JavaScript Strings
- JavaScript String Methods
- JavaScript Numbers
- JavaScript Number Methods
- JavaScript Arrays
- JavaScript Array Methods
- JavaScript Sorting Arrays
- JavaScript Array Iteration
- JavaScript Date Objects
- JavaScript Date Formats
- JavaScript Get Date Methods
- JavaScript Set Date Methods
- JavaScript Math Object
- JavaScript Conditions
- JavaScript Switch
- JavaScript Loop For
- JavaScript While Loop
- JavaScript Break and Continue
- JavaScript Type Conversion
- JavaScript Errors
- JavaScript Scope
- JavaScript this Keyword
- JavaScript Classes
- JavaScript Debugging
- JavaScript - Changing CSS
- JavaScript JSON
JavaScript Variables
JavaScript Variables
JavaScript variables are containers for storing data values. And you can define variables with var keyword Let's take an example and x, y, and z, are variables:
From the above example, you can expect:
- x stores the value 3
- y stores the value 6
- z stores the value 9
Declaring (Creating) JavaScript Variables
Creating a variable in JavaScript is called "declaring" a variable.
You declare a JavaScript variable with the var keyword:
var carName;
After the declaration, the variable has no value (technically it has the value of undefined).
To assign a value to the variable, use the equal sign:
You can also assign a value to the variable when you declare it:
In the example below, we create a variable called carName and assign the value "Volvo" to it.
Then we "output" the value inside an HTML paragraph with id="demo":
Example
<p id="demo"></p>
<script>
var carName = "Volvo";
document.getElementById("demo").innerHTML = carName;
</script>
Download free E-book of JAVASCRIPT
#askProgrammers Learn Programming for Free
Join Programmers Community on Telegram
Talk with Experienced Programmers
Just drop a message, we will solve your queries
