Scalar types:
- A scalar type represents a single value.
- Integers:
  - unsigned: (u8, u16, u32, u64, u128, usize) 
  - signed: (i8, i16, i32, i64, i128, isize)
  - defaults to u32
  - usize/isize change automatically depending on CPU architecture
- Floating point:
  - f32, f64
  - defaults to f64
- Booleans:
  - true/false
- Char:
  - Defined with '' as opposed to "" (which are used for strings)
  - Can store unicode characters

Compound types:
- Compound types can group multiple values into one type. 
  Rust has two primitive compound types: tuples and arrays.
- Tuple:
  - A tuple is a general way of grouping together a number of values with a variety of types into 
   one compound type. Tuples have a fixed length: once declared, they cannot grow or shrink in size.
  - We create a tuple by writing a comma-separated list of values inside parentheses. 
    Each position in the tuple has a type, and the types of the different values in the tuple don’t 
    have to be the same. 

    okay i cant be bothered typing more: https://doc.rust-lang.org/stable/book/ch03-02-data-types.html

- Arrays:
  - defined with square brackets []
  - all elements must be of the same type
  - fixed length
  - Arrays are defined like so:
    - let a: [i32; 5] = [1, 2, 3, 4, 5];
      - the first square brackets contain the type and the length
  - Array elements are fetched by using the index of the object a[0] = 1, a[1] = 2, etc