Primitives

Primitives#

Type	Notes
`i8 i16 i32 i64 i128 isize`	signed integers; `isize` is the pointer-width signed.
`u8 u16 u32 u64 u128 usize`	unsigned; `usize` is the pointer-width unsigned (used for indices and lengths).
`f32 f64`	IEEE 754. `f64` is the default.
`bool`	`true` / `false`. Not an integer; cannot coerce.
`char`	4-byte Unicode code point. Not a byte.
`()`	unit; one value, also `()`. Used as “no return value”.
`!`	never; the type of expressions that diverge (`panic!`, `return`, `continue`).

Integer literal suffixes pin the type.

let n = 42_u32;

let big = 1_000_000_i64;