JavaScript Tutorial #02 Syntax

Posted at: May 4, 2019 3:41 PM

In this lesson we will learn basic syntax of JavaScript.

The syntax of JavaScript is the set of rules that define a correctly structured JavaScript program.

Case sensitivity

JavaScript is case sensitivity. Lower-case and upper-case letter is different variable or function.


Spaces, tabs and newlines used outside of string constants are called whitespace. JavaScript Ignore the whitespace. You can use spaces, tabs and newlines in your programs.


Semicolons terminate the statement. It is optional. Some statements that are well formed when a newline is parsed will be considered complete. The statement should be terminated with a semicolon.

With Semicolons

Without Semicolons

Above both code is working fine.


Comment syntax is the same as in C++ and many other languages.

This lesson also available on YouTube
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