What is the difference between dynamic scoping and lexical scoping?
An example of an AI chatbot conversation about dynamic vs lexical scoping in programming languages.
What is the difference between dynamic scoping and lexical scoping?
Dynamic scoping and lexical scoping are two different ways to resolve variable names in programming. Lexical scoping uses the structure of the code to determine variable scope, while dynamic scoping uses the call stack at runtime.
Can you give me an example of each?
Sure! In lexical scoping, a variable defined in a function is only accessible within that function and its nested functions. In dynamic scoping, 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?
Lexical scoping is more commonly used in modern programming languages like JavaScript, Python, and Ruby, as it provides more predictable behavior.
Are there any languages that use dynamic scoping?
Yes, some languages like Perl and older versions of Lisp use dynamic scoping. However, it's less common in contemporary languages.
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