What is the difference between Setf and SETQ?
1. What is the difference between setf and setq? Explanation: Setq is used only for setting the values of symbols but setf can be used for anything. Setf can be used for setting value of any data-type and not only symbols.
What does SETQ mean?
(The ‘ q ‘ in setq means quote .) With set , the expression would look like this: (set ‘carnivores ‘(lion tiger leopard)) Also, setq can be used to assign different values to different variables.
What are macros in Lisp?
The Common Lisp macro facility allows the user to define arbitrary functions that convert certain Lisp forms into different forms before evaluating or compiling them. This is done at the expression level, not at the character-string level as in most other languages.
What is lambda in Lisp?
A lambda expression is a function object written in Lisp. Here is an example: (lambda (x) “Return the hyperbolic cosine of X.” (* 0.5 (+ (exp x) (exp (- x))))) In Emacs Lisp, such a list is a valid expression which evaluates to a function object. A lambda expression, by itself, has no name; it is an anonymous function.
What is let in LISP?
The let expression is a special form in Lisp that you will need to use in most function definitions. let is used to attach or bind a symbol to a value in such a way that the Lisp interpreter will not confuse the variable with a variable of the same name that is not part of the function.
Which is used to represent the prompt in LISP?
* symbol is used to represent the prompt in LISP.
What is Progn Lisp?
Description: progn evaluates forms, in the order in which they are given. The values of each form but the last are discarded. If progn appears as a top level form, then all forms within that progn are considered by the compiler to be top level forms.
What is defun in Lisp?
In Lisp, a symbol such as mark-whole-buffer has code attached to it that tells the computer what to do when the function is called. This code is called the function definition and is created by evaluating a Lisp expression that starts with the symbol defun (which is an abbreviation for define function).
Is Common Lisp still used?
LISP. One of the old languages, LISP, has lost its fame and started its journey to death. The language is being rarely used by developers these days.
Is Lisp better than Python?
Lisp programming language provides good performance when compared to Python programming language. The performance of the Python programming language is less when compared to the Lisp programming language. There are macros in the Lisp Programming language. There are no macros in the Python programming language.
Why are Lisp macros useful?
Lisp macros work great because of the Lisp syntax nature. Lisp is an extremely regular language (think of everything is a list); macros enables you to treat data and code as the same (no string parsing or other hacks are needed to modify lisp expressions).
Is defun a macro?
A macro to define clojure functions with pattern matching just as erlang or elixir. It supports both clojure and clojurescript.
What is map in Lisp?
Advertisements. Mapping functions are a group of functions that could be applied successively to one or more lists of elements. The results of applying these functions to a list are placed in a new list and that new list is returned.
What is an atom in Lisp?
In Lisp, all of the quoted text including the punctuation mark and the blank spaces is a single atom. This kind of atom is called a string (for “string of characters”) and is the sort of thing that is used for messages that a computer can print for a human to read.
How many types of variables are available in Lisp?
two types
LISP supports two types of variables: Local variables. Global variables.
Which is not the commonly used programming language for AI?
Which is not the commonly used programming language for AI? Explanation: Because Perl is used as a script language, and not of much use for AI practice. All others are used to generate an artificial program.
What is LISP syntax?
The syntactic elements of the Lisp programming language are symbolic expressions, also known as s-expressions. Both programs and data are represented as s-expressions: an s-expression may be either an atom or a list. Lisp atoms are the basic syntactic units of the language and include both numbers and symbols.