Syntax for getting value of a defined variable.

R7RS 1.1

Scheme’s model of arithmetic is designed to remain as independent as possible of the particular ways in which numbers are represented within a computer. In Scheme, every integer is a rational number, every rational is a real, and every real is a complex number. Thus the distinction between integer and real arithmetic, so important to many programming languages, does not appear in Scheme. In its place is a distinction between exact arithmetic, which corresponds to the mathematical ideal, and inexact arithmetic on approximations. Exact arithmetic is not limited to integers.

Currently L only performs arithmetic operations on integers.

%Lf

%lld

In the evaluator, references are held in the reader and in ret. The evaluator can be augmented to create variables by reference.

list evaluates it’s arguments to create a list. It looks just like a procedure. Consider a variant of list which doesn’t evaluate it’s arguments. A list which is like a variadic quote. Write a list procedure like that in terms of cons, car and, cdr.