Simple Data Types

Table: A complete list of built-in Darwin types.

1.1 

Table: A complete list of built-in Darwin types.

constant	Any number or variable assigned	1, 33, 203, 39293
	a number.
Type Name	Description	Example
boolean	boolean	true, false
real	Real numbers.	$1, 1.1, 1.01, 1.001, \ldots$
integer	Integers.	$\ldots -2, -1, 0, 1, 2 \ldots$
posint	Integers greater than zero	$1, 2, 3, \ldots$
name	A legal Darwin name or a procedure	abc, a1, proc() end:
	declaration
string	Any sequence of symbols surrounded	'hello'
	by single quotes
anything	Any built-in type	posint, string
uneval	An unevaluated procedure call.	undefined()
procedure	A built-in Darwin routine	mod, sin, exp
equation	A sequence of the form	y=5, x=z
	expression=expression
range	$x\ldots y$ where x,y are of type real	1..100
list	an ordered multiset (surrounded	[a,b, c]
array	by [, ] symbols)
set	an unordered set (surrounded	{1, 2, 3}
	by {, } or (* *)
matrix	a two-dimensional square array	[[1, 2], [3, 4]]
database	A Darwin sequence database	DB
grid	A Darwin grid file	g := CreateGrid()
structure	A built-in Darwin structured typed	Tree, Match, Gene