Data Types — Nyra Docs

Quick reference

Most-used built-in types:

Type	Example	Notes
`i32`	`42`	32-bit signed integer (default for literals)
`i64`	`10000000000`	64-bit signed integer
`bool`	`true`	Boolean
`string`	`"hi"`	UTF-8 text (heap-owned when dynamic)
`void`	—	No return value

Examples by type

You can write the type explicitly or let the compiler infer it.

fn main() {
    let count = 42
    let flag = true
    let name = "Nyra"
    print(count)
    print(flag)
    print(name)
}

fn main() -> void {
    let count: i32 = 42
    let flag = true
    let name: string = "Nyra"
    print(count)
    print(flag)
    print(name)
}

Output

42
true
Nyra

Type sizes (bytes & bits)

The number in the type name is its width in bits: i32 is 32 bits, i64 is 64 bits. Use the compiler intrinsic size_of<T>() to get the size in bytes (multiply by 8 for bits). No import needed.

Type	Bits	Bytes (`size_of`)
`i8` / `u8`	8	1
`i16` / `u16`	16	2
`i32` / `u32`	32	4
`i64` / `u64`	64	8
`i128` / `u128`	128	16

fn main() {
    let num = 10
    let num2 = 20

    print(size_of<i32>())        // 4 bytes
    print(size_of<i32>() * 8)    // 32 bits
    print(size_of<i64>())        // 8 bytes
    print(size_of<i64>() * 8)    // 64 bits
}

fn main() -> void {
    let num: i32 = 10
    let num2: i32 = 20

    print(size_of<i32>())        // 4 bytes
    print(size_of<i32>() * 8)    // 32 bits
    print(size_of<i64>())        // 8 bytes
    print(size_of<i64>() * 8)    // 64 bits
}

Output

More: stdlib → size_of / align_of.