Values

Rell offers various data types for managing information in your dapps. Here's an overview of the fundamental types you'll use.

Simple values

• Null: Represents the absence of a value. It has its own distinct type, null.
• Boolean: Represents logical values, either true or false. Employ them for conditional logic and decision-making.
• Integer: Represents whole numbers, both positive and negative, like 123, 0, and -456. Use them for counting, indexing, and mathematical operations.
• Text: Represents sequences of characters, enclosed in either single quotes ('Hello') or double quotes ("World"). Store and manipulate text data effectively.
• Byte array: Represents a sequence of bytes, essential for handling binary data. Prefix them with x' for single quotes or x" for double quotes (e.g., x'1234', x"ABCD").
• Big integer: Represents arbitrarily large whole numbers, denoted by a suffix of L (e.g., 9223372036854775832L). Handle massive numerical values with ease.
• Decimal: Represents numbers with decimal places, like 123.456. Crucial for precise calculations and financial applications.

Text literals

• Standard: \r (carriage return), \n (line feed), \t (tab), \b (backspace)
• Special characters: \" (double quote), \' (single quote), \\ (backslash)
• Unicode: \u003A (e.g., represents a colon)

Trailing commas

A trailing comma is allowed in any comma-separated list, including collections, function parameters, and enums.

val my_list = [
    123,
    456,
    789,
];

val my_map = [
    123: 'A',
    456: 'B',
];

enum colors {
    RED,
    GREEN,
    BLUE,
}

function f(
    x: integer,
    y: text,
) {
    // function body
}

query q() = f(
    123,
    'A',
);