HOW HTML, CSS, & JAVASCRIPT FIT TOGETHER

Creating a Basic JavaScript

Code below is a basic JavaScript
Linking to a javascript file from an HTML page in this html tag

<script src="js/ add-content.js"></ script>
The best palce to put scripts in their own files is the end of the body
A script is a series of instructions that a computer can follow one-by-one. Each individual instruction or step is known as a statement.
Statements should end with a semicolon.
writting comments to explain what your code does.They help make your code easier to read and understand. This can help you and others who read your code.
- Tow ways to write comment
  - 1- // for single line
  - 2- / / for multi line
A script will have to temporarily store the bits of information it needs to do its job. It can store this data in variables.
A variable is a good name for this concept because the data stored in a variable can change (or vary) each time a script runs
The variable decleration is as this var x;
The variable Assigning is as this x=3; -JavaScript distinguishes between numbers,strings, and true or false values known as Booleans.
- 3 is a number
- 'Ahmed' is a strings
- Boolean is a true or false

A variable name in JavaScript
- 1- must be started with a letter.
- 2- can contain letters,numbers, dollar sign ($), or an underscore (_). Note that you must not use a dash(-) or a period (.) in a variable name.
- 3- should not be keyWord such as if
- 4-is the case sensetive: so score and Score would be different variable names, but it is bad practice to create two variables that have the same name using different cases.