JavaScript used to make websites more interactive( by accessing and modifying the content, Programing rules or instructions the browser can follow ,responding to what the user does) interesting, and user-friendly.
jQuery makes writing JavaScript a lot easier.
A script is a series of instructions that a computer can follow to achieve a goal step-by-step.
Each time the script runs, it might only use a subset of all the instructions.
Computers approach tasks in a different way than humans, so your instructions must let the computer solve the task programmatically.
To write a script, you need to first state your goal and then list the tasks that need to be completed in order to achieve it.
1: DEFINE THE GOAL
2: DESIGN THE SCRIPT (using flow chart to help )
3: CODE EACH STEP
Expressions + Operators notes :
An expression evaluates into (results in) a single value. Broadly speaking there are two types of expressions.
Expressions rely on things called operators; they allow programmers to create a single value from one or more values.