1 Built Ins

Built-in functions

Regular functions

Symbol	Argument Count	Argument Types	Description	Accepted Keywords
`+`	any	`:number`	Adds up the arguments
`-`	any	`:number`	Subtracts the arguments from the first one
`*`	any	`:number`	Multiplies the arguments together
`/`	any	`:number`	Divides the arguments
`=`	any	overloaded	Checks if all the arguments are equivalent
`pair`	2	any	Returns a pair of the two arguments
`first`	1	`:pair`	Returns the first element of the pair
`rest`	1	`:pair`	Returns the rest of the pair
`eval`	1	any	Evaluates the argument
`prog`	any	any	Combines multiple expressions to one
`list`	any	any	Returns a list of the arguments
`print`	1	any	Prints the arguments	`:end` `:sep`
`read`	0 or 1	any	Reads a string from stdin
`type`	1	any	Returns the type of the argument
`exit`	0 or 1	`:number`	Exits the interpreter with the given exit code

Special forms

Symbol	Argument Count	Argument Types	Description
`and`	any	any	Logic and (with short circuiting)
`or`	any	any	Logic or (with short circuiting)
`not`	1	any	Logic not
`if`	2 or 3	any	First arguments is the condition, second the “then” part, the optional thirt is the “else” part
`quote`	1	any	Returns the argument without evaluating it (as the syntax tree)
`define`	2	`:symbol`, any	Defines a Symol in the the current environment

Reference

`+`

Accepts any number of arguments of type :number and returns the sum of them.

(+ 1 2 3) ;; 1 + 2 + 3
> 6.00000

`-`

Accepts any number of arguments of type :number and returns the difference of the first number to the sum of the other arguments.

(- 10) ;; watch out !
> 10.00000

(- 10 2 3 1) ;; 10 - 2 - 3 - 1 => 10 - (2 + 3 + 1)
> 4.00000

`*`

Accepts any number of arguments of type :number and returns the product of them.

(* 3 4 2) ;; 3 * 4 * 2
> 6.00000

`/`

Accepts any number of arguments of type :number and returns the quotient of them.

(/ 100)
> 100.00000

(/ 100 5 2) ;; ((100 / 5) / 2)
> 10.00000

`=`

Accepts any number of arguments of any type and compares them, returning 1.00000 if they are all equivalent (might still be different objects) or nil if they are not all the same. The finction is overloaded for all the built-in types

(= 100)
> 100.00000

(/ 100 5 2) ;; ((100 / 5) / 2)
> 10.00000

Built-in functions

Regular functions

Special forms

Reference

`+`

`-`

`*`

`/`

`=`

`pair`

`first`

`rest`

`eval`

`prog`

`list`

`print`

`read`

`type`

`exit`

`and`

`or`

`not`

`if`

`quote`

`define`