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Common Lisp

Common Lisp

A programmable programming language.

Master Common Lisp with
Interactive Learning

Elevate your Common Lisp skills through 96 curated exercises across 15 core concepts. Master problem-solving with a structured learning path designed for modern developers.

Common Lisp

About Common Lisp

Common Lisp is an offshoot of the long-running family of Lisp programming languages. It's a multi-paradigm programming language that allows you to choose the approach and paradigm according to your application domain.

Common Lisp has fast prototyping capabilities, and exceptional support for object oriented programming. It also boasts a macro system which allows you to adapt the language to your needs, and a run-time environment which allows modification of running applications.

To learn more about Common Lisp, take a look at the Common Lisp homepage

Key Features of Common Lisp

Interactive

Common Lisp has a full featured REPL, development can happen as a 'conversation' with the system.

Inspectible

Common Lisp is fully inspectable with built-in functions for exploring every part of the language.

Homoiconicity

Code has the same structure as data, allowing for powerful macros: code that writes code.

Extensible

Generic functions, reader-macros, and flexible namespacing allow for the extension of the language

Standardized

The language is very stable, with multiple implementations to match your needs – JVM, embedded, etc.

Multi-paradigm

Whether you prefer a functional style or something more object-oriented, Lisp adapts to your needs.

Track icon

Interactive

Common Lisp has a full featured REPL, development can happen as a 'conversation' with the system.

Inspectible

Common Lisp is fully inspectable with built-in functions for exploring every part of the language.

Homoiconicity

Code has the same structure as data, allowing for powerful macros: code that writes code.

Extensible

Generic functions, reader-macros, and flexible namespacing allow for the extension of the language

Standardized

The language is very stable, with multiple implementations to match your needs – JVM, embedded, etc.

Multi-paradigm

Whether you prefer a functional style or something more object-oriented, Lisp adapts to your needs.

A taste of Common Lisp concepts you'll cover

Co

Cons

Ex

Expressions

Sy

Symbols

Li

Lists

In

Integers

Fl

Floating Point Numbers

Ar

Arithmetic

Da

Date and Time

Mu

Multiple Values

Fu

Functions

Co

Conditionals

Tr

Truthy And Falsy

Ma

Mapping

Fi

Filtering

Ha

Hash Tables

La

Lambda List

Ke

Keyword Parameters

Op

Optional Parameters

Re

Rest-Parameters

Ch

Characters

St

Strings

Ar

Arrays

Ve

Vectors

Re

Reducing

Eq

Equality

Fo

Format - Basics

Co

Comments

Dive into Common Lisp practice challenges

Hello World
Hello World
Level 1

SlaveCode's classic introductory exercise. Just say "Hello, World!".

Two Fer
Two Fer
Level 1

Create a sentence of the form "One for X, one for me.".

Hamming
Hamming
Level 1

Calculate the Hamming distance between two DNA strands.

House
House
Level 2

Output the nursery rhyme 'This is the House that Jack Built'.

RNA Transcription
RNA Transcription
Level 1

Given a DNA strand, return its RNA complement.

Leap
Leap
Level 1

Determine whether a given year is a leap year.