Data Types

Rust is statically typed, which means it knows all the types at compile time. The compiler can infer (usually) what type a variable is, but there are cases where it cannot.

An example is parsing a string:

let guess: u32 = "42".parse().expect("Not a number!");

Without the declared type, compiler will throw an error.

Scalar Types

Scalar types represent a single value. Rust has four primary scalar types:

1. integer
2. floating point numbers
3. boolean
4. characters

Compound Types

Compound types can group multiple values into one type. Rust has two primary compound types:

1. Tuple
2. Array