Format also has the option to print the values in tabulated columns.

Eval evaluates the expression twice during execution.

Format primitive helps to create messages consisting of both uppercase and lowercase letters.

The print primitive evaluates its single argument and prints it on a new line and prints a trailing space character.

With-open-file can read expressions from data files one at a time, as they are needed for processing.

From procedure name to produce procedure object # is used always.

It is used to modify a procedure's basic behaviour along the line.

MEMBER will return what is left of the list when the matching symbol is encountered.

Equal primitive tests two arguments to see if their values are the same expression. It works on atoms and lists.

A predicate is a procedure that returns a value that signals true or false.

To compare patterns and datums element by element matching is used.

Match keeps variable binding on an association list.

Patterns can contain elements called pattern variables.