Explain the concept of scope in JavaScript and the differences between global and local scope.
Explain the concept of scope in JavaScript and the differences between global and local scope.
327
16-Jul-2023
Updated on 17-Jul-2023
Aryan Kumar
17-Jul-2023Sure. In JavaScript, scope refers to the visibility of a variable or function. A variable or function is only visible within its scope.
There are two types of scope in JavaScript: global scope and local scope.
Here is an example of global scope:
In this example, the variable
myVariableis declared in the global scope. This means that it is visible from anywhere in the program, including the functionmyFunction().Here is an example of local scope:
In this example, the variable
myLocalVariableis declared in the functionmyFunction(). This means that it is only visible from within the functionmyFunction().The following table summarizes the differences between global and local scope: