Variables and Types

Declaring variables

Variables are declared with the var keyword, followed by a type and a name:

var int count = 0
var string name = "CColon"
var float pi = 3.14159
var bool active = true

Every variable must be initialized when declared.

Reassignment

After a variable is declared, you can reassign it without the var keyword:

var int x = 10
x = 20
x = x + 5

Types

CColon has six built-in types:

int

64-bit signed integer.

Property	Value
Size	64 bits
Minimum value	-9,223,372,036,854,775,808
Maximum value	9,223,372,036,854,775,807

var int a = 42
var int b = -7
var int c = 1000000

float

64-bit floating-point number (IEEE 754 double precision).

Property	Value
Size	64 bits
Precision	~15 to 17 significant decimal digits
Minimum value	~5.0 x 10^-324
Maximum value	~1.8 x 10^308

var float pi = 3.14159
var float temp = -23.5
var float ratio = 0.75

string

A sequence of characters, enclosed in double quotes.

var string greeting = "Hello, World!"
var string empty = ""

Supported escape sequences:

Escape	Character
\n	Newline
\t	Tab
\\	Backslash
\"	Double quote

bool

A boolean value, either true or false.

var bool done = false
var bool ready = true

list

A dynamic, ordered collection of values. Lists can hold mixed types and grow or shrink at runtime.

var list numbers = [1, 2, 3]
var list mixed = ["hello", 42, true, 3.14]
var list empty = []

See Lists and Arrays for more.

array

A fixed-size collection. Created with the fixed() function. Once created, the length cannot change.

var array coords = fixed([10, 20, 30])

See Lists and Arrays for more.

Type conversions

Values can be converted between types using built-in methods:

var int n = 42
var string s = n.tostring()       // "42"
var float f = n.tofloat()         // 42.0

var string numStr = "123"
var int parsed = numStr.toint()   // 123
var float pf = numStr.tofloat()   // 123.0

var float x = 3.7
var int truncated = x.toint()     // 3

See Methods on Values for the full list.