Variables
Explore JavaScript variables focusing on how to declare and use var, let, and const. Understand dynamic typing and variable scope including global, function, and block scopes. Learn why const is recommended for immutable variables and best practices to avoid common pitfalls.
We'll cover the following...
We'll cover the following...
What is a variable?
In general, a variable refers to anything that can vary. In JavaScript, a variable stores the data value that can be changed later on. We can use the reserved keyword var to declare a variable in JavaScript.
There are two types of variables:
- With static variables, each variable and expression type is already known at compile time. Once a variable is declared to be of a certain