Literals and Types
Syntax constructs such as 42, 3.14, 0xFF, and false are known as literals. Literals provide a straightforward way to represent fixed values directly in code.
Basic Types
MoonBit provides various basic data types, with their corresponding literal representations:
| Type | Literal Example | Description |
|---|---|---|
Int |
42 |
32-bit signed integer |
Double |
3.14 |
Double-precision floating point |
Bool |
true, false |
Boolean value, true or false |
Char |
'a' |
Single Unicode character |
String |
"hello" |
String, composed of zero or more characters |
Unit |
() |
A special type with a single value, typically used to indicate the absence of a meaningful return value from a function |
Different Representations of Integer Literals
Integers can be represented in multiple number bases. MoonBit supports:
- Decimal:
1000000or1_000_000(underscore separators for readability) - Hexadecimal:
0xFFFF(prefixed with0x) - Octal:
0o777(prefixed with0o) - Binary:
0b1010(prefixed with0b)
Arithmetic Operations
This example demonstrates basic arithmetic operators and the use of different numeric types.
///|
fn main {
// Different representations of integers
let dec : Int = 1000000
let dec2 : Int = 1_000_000
let hex : Int = 0xFFFF
let oct = 0o777
let bin = 0b1001
println("numbers:")
println(dec)
println(dec2)
println(hex)
println(oct)
println(bin)
// Basic arithmetic operations
println("arithmetic:")
println(1 + 2)
println(1 - 2)
println(1 * 2)
println(5 / 2)
println(10 % 3)
// Floating-point types
let num1 : Double = 3.14 // Double-precision floating point
let num2 : Float = 3.14 // Single-precision floating point
println("floating point:")
println(num1)
println(num2)
}