Challenge Global Scope And Functions - thelastmile/FreeCodeCamp GitHub Wiki
Challenge Global Scope and Functions
In JavaScript, scope
refers to the visibility of variables. Variables which are defined outside of a function block have Global
scope. This means, they can be seen everywhere in your JavaScript code.
Variables which are used without the var
keyword are automatically created in the global
scope. This can create unintended consequences elsewhere in your code or when running a function again. You should always declare your variables with var
.