Which of the following statements about scoping in Scheme is correct?
A) A bound variable is a variable referenced within a function that is not also a formal parameter to that function.
B) A free variable is a variable within a function that is also a formal parameter to that function.
C) A free variable is a variable referenced within a function that is not also a formal parameter to that function.
D) A free variable is one that is bound within a nested function.

Question

Quizplus · Accepted Answer

In Scheme, a free variable is a variable referenced within a function that is not also a formal parameter to that function. A bound variable, on the other hand, is a variable that is either a formal parameter to the function or has been locally bound by a let or lambda expression. Therefore, the correct statement about scoping in Scheme is that a free variable is a variable referenced within a function that is not also a formal parameter to that function.

Which of the Following Statements About Scoping in Scheme Is