The given list of character letter grades A,B,C,D can be implemented using arrays or linked list syntax which is contained in 2. Scheme language.
What is Scheme language?
A multi-paradigm programming language is called Scheme. It is a Lisp dialect that enables both procedural and functional programming.
A suitably tail-recursive and statically scoped dialect of Lisp is called Scheme. First class procedures, like in the lambda calculus, were included into one of the first programming languages, Scheme, demonstrating the value of static scope restrictions and block structure in a dynamically typed language. The distinction between procedures and lambda expressions and symbols, the use of a single lexical environment for all variables, and the evaluation of the operator position of a procedure call in the same way as an operand position were all first introduced in Scheme, the first significant dialect of Lisp.
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