Types

To write formulas, you need to be aware of the concept of types. Expressions (constants, variables, 

parameters, etc.) in formulas can have different types. Ultra Fractal supports five types. The 

following table shows each type and explains it use.

bool

Boolean expressions can only have two values: true or false. This type is returned 

when expressions are compared: 

3 < 4 ; true

false == true ; false

int

Integers are useful for counting. They can have values from  2147483648 to 

2147483647. Most arithmetic operations can be performed on integers. Example: 

3

 2

float

Floating point numbers are the most familiar type of numbers. They can be very 

small or large, and have virtually unlimited precision (see 

Arbitrary precision

). 

Their greatest benefit is that they can represent fractional values. Examples: 

3.1

 2.9

1.3e7

complex

Complex expressions represent complex numbers. They consist of two floating 

point numbers and are used to perform complex arithmetic, which is very useful 

for fractal calculations. Examples: 

(2.8, 4)

2.8 + 4i

color

Color expressions represent a color. You can perform operations on colors and 

store them in color variables. Internally, a color is stored as four floating point 

values, corresponding to red, green, blue, and alpha (opacity) components. Each 

value ranges from 0 to 1. Colors are intended only for 

direct coloring algorithms

.

Next: 

Constants

See Also

Expressions

Type compatibility

Operators

Functions

269