What is the difference between lexical and dynamic scope?
An example of an AI chatbot conversation about lexical vs dynamic scope in programming languages.
What is the difference between lexical and dynamic scope?
Lexical scope means that the scope of a variable is determined by its location within the source code, while dynamic scope means that the scope is determined by the call stack at runtime.
Can you give me an example of each?
Sure! In lexical scope, a variable defined in a function is only accessible within that function and 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 programming languages use lexical scope?
Languages like JavaScript, Python, and Java use lexical scope. They determine variable accessibility based on the physical structure of the code.
And what about dynamic scope?
Dynamic scope is less common but is used in languages like Perl and some Lisp dialects, where the variable's accessibility is determined by the call history.
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