What is the difference between dynamic and static scope in programming?

What is the difference between dynamic and static scope in programming?

Static scope (or lexical scope) means that the scope of a variable is determined by its location in the source code. Dynamic scope, on the other hand, determines the scope based on the call stack at runtime.

Can you give me an example of each?

Sure! In static scope, if a variable is defined in a function, it can only be accessed within that function or its nested functions. In dynamic scope, a variable can be accessed by any function that is called after it is defined, regardless of where it is defined.

Which one is more commonly used in modern programming languages?

Most modern programming languages, like JavaScript and Python, use static scoping because it makes code easier to understand and maintain.

Are there any languages that use dynamic scoping?

Yes, some languages like Perl and older versions of Lisp use dynamic scoping, but it's less common in contemporary programming.