Global Scope
Those variables which are declared outside the function or blocks or you can say curly braces({}) are having a global scope.
In a JavaScript program, global variables can be accessed from anywhere.
The scope of var, let, and const are quite equivalent when declared outside the function.
Example: In this example, we will declare all the variables outside the function and now we can access those variables from anywhere in the Javascript program.
Javascript
var global_variable1 = "w3wiki";let global_variable2 = "Geeks";const global_variable3 = "GFG";function check_global_variables(){ console.log(global_variable1); console.log(global_variable2); console.log(global_variable3);}check_global_variables(); |
Output
w3wiki Geeks GFG
Javascript Scope
JavaScript Scope is the area where a variable (or function) exists and is accessible. We can layer the scope in a system which means the child scope can access the parent scope but not vice-versa.