JavaScript Programs
A computer program is a list of “instructions” to be “executed” by a computer.

In a programming language, these programming instructions are called statements.

A JavaScript program is a list of programming statements.

In HTML, JavaScript programs are executed by the web browser.

JavaScript Statements
JavaScript statements are composed of:

Values, Operators, Expressions, Keywords, and Comments.

This statement tells the browser to write “Hello Dolly.” inside an HTML element with id=”demo”: