Scope determines the accessibility (visibility) of variables. JavaScript variables have 3 types of scope: Block scope; Function scope; Global scope

JavaScript had Global Scope and Function Scope. ES6 introduced the two new JavaScript keywords: let and const . These two keywords provided Block Scope in JavaScript:

Declaring a variable with const is similar to let when it comes to Block Scope. The x declared in the block, in this example, is not the same as the x declared outside the block: Example

All JavaScript variables must be identified with unique names. These unique names are called identifiers . Identifiers can be short names (like x and y) or more descriptive names (age, sum, …

JavaScript variables can belong to: The local scope or The global scope. Global variables can be made local (private) with closures. Closures makes it possible for a function to have "private" …

Hoisting is JavaScript's default behavior of moving all declarations to the top of the current scope (to the top of the current script or the current function). The let and const Keywords Variables …

The var statement declares a variable. Variables are containers for storing information. Creating a variable in JavaScript is called "declaring" a variable:

Method Scope. Variables declared directly inside a method are available anywhere in the method following the line of code in which they were declared:

The scope is the binding part between the HTML (view) and the JavaScript (controller). The scope is an object with the available properties and methods. The scope is available for both the view …

PHP Variables Scope. In PHP, variables can be declared anywhere in the script. The scope of a variable is the part of the script where the variable can be referenced/used. PHP has three …