1. JavaScript Create Array object
Introduce If statement, comparison operator, logical operator
Picture changes from clicking on the channel button
Using setInterval() for image to change on it own

2. Create Array object Array is another means to store value
Array stores list of values
Each value is an element of the Array and has an associated index
Syntax to create an Array
var array_name = new Array(size);
Example
var shopping_list = new Array(10);

3. Create Array object Store values (data) Another way to create Array
array_name[i] = value; (i= 0,1,2…n)
shopping_list[i] = “car”;
Another way to create Array
var array_name = new Array(value1, value2, …, valueN);
var shopping_list = new Array(“Car”, “PDA”, “mp3 player”);

4. Operators Comparison Operators Logical Operators
==, !=, >, <, >= , <=
Logical Operators
&&(AND), || (OR), ! (NOT)
These operator are used to write the conditions in conditional and repetitive statements

5. Conditional Statement
Conditional statement allows different actions or code to be executed based on validity of condition
If Statement
Syntax
If( )
Semantics
Evaluate the condition (true or false)
If the condition is true
True: DO STATEMENT
False: SKIP the STATEMENT
Condition
STATEMENT

6. Conditional Statement
If…else statement
Syntax:
If( )
else
Semantics:
Evaluate condition
If the condition is,
True: Do STATEMENT 1
False: Do STATEMENT 2
Condition
STATEMENT 1
STATEMENT 2

7. Using setInterval()
JavaScript can execute in response to a timer event
Write up the code you would like to be executed multiple times at a regular interval
Use the setInterval of the window class
Example:
window.setInterval(“code to be executed”, 1000);