What do number literals with a suffix, like 0u8, mean in Rust?

Question

I'm reading through The Rust Programming Language and have encountered this notation: 0u8.

let some_u8_value = 0u8;
match some_u8_value {
    1 => println!("one"),
    3 => println!("three"),
    5 => println!("five"),
    7 => println!("seven"),
    _ => (),
}

After searching the web, I've found lots of examples of this notation being used (0b01001100u8, 0x82u8, 200u8), but what exactly does this notation mean?

Answer 1

Suffixed Literals

After searching, I've found this explanation in the same book:

... all number literals except the byte literal allow a type suffix, such as 57u8...

So 0u8 is the number 0 as an unsigned 8-bit integer.

These are referred to as "suffixed literals" and are discussed at length in Rust By Example.