integer literal in Rust

All number literals except the byte literal allow a type suffix, such as 57u8, and _ as a visual separator, such as 1_000.
Number literals | Example
------ | ------
Decimal | 98_222
Hex | 0xff
Octal | 0o77
Binary | 0b1111_0000
Byte (u8 only) | b'A'