Number literals: radixes and width suffixes

An integer literal may be written in decimal, hexadecimal (0x), octal (0o), or binary (0b); floats accept scientific notation (1e6). A width suffix pins the exact numeric type, and underscores may group digits for readability (they are ignored).

a = 42          // i64 (default)
b = 200u8       // unsigned 8-bit
c = 9_000i64    // underscores are ignored
d = 3.14f64     // float
f = 0xFFu32     // hex
g = 0b1010_1100u8   // binary
h = 0o755u16    // octal

Related

- Numbers

- Expressions