declare a global variable in Javascript

  //Declaring Global Variable
  var myGlobalVariable = "This is a global variable";

This code declares a global variable named “myGlobalVariable” with a value of “This is a global variable”. Global variables are stored in the global scope, meaning that any part of our code can access them. A variable declared outside of any function is a global variable, and its value remains in memory throughout the lifetime of a script. Global variables play an important role in programming as they allow us to access and manipulate data from anywhere in our code. In this example, any time we reference the “myGlobalVariable” variable, we will be able to access the value of “This is a global variable”.