Welcome to Page

A Functional Programming Language Based on Lisp.

This is the interpreter for Page, a functional programming langauge based on Lisp. All parts were written from scratch using Go. The interpreter uses a recursive descent approach for parsing.

Program Examples

1. Fibonacci

2. Factorial

Documentation

1. Lists

> (list 1 2 3) // define list.
(list 1 2 3)

> (car (list 1 2 3)) // get first element
1

> (cdr (list 4 5 6)) // get rest
(list 5 6)

> (cons 1 (list 4 5 6)) // construct new list with elements combined
(list 1 4 5 6)

> (length (list 1 2 3))
3

2. Function Definitions

> (define (add a b) (+ a b))

> (add 2 5)
7

> (define (isEven n) (= (% n 2) 0))

> (isEven 5)
False

3. Strings

> (length "hello")
5

> (equals "hello" "world")
False

> "Hello World"
Hello World

3. Numbers

> 10
10

> (+ 5 5 )
10

> (% 4 2)
0

> (/ 4 2)
2

> (* 2 2)
4