# Chapter 5
  

## Other Numeric Types

### Decimal Type
  - The Decimal class provides useful features to work with decimals with fixed
    precision.
### Fraction Type
  - Fraction and Decimal type provide more accuracy and simplify results.
    automatically
### Sets
  - They are unordered, immutable, unique collection of objects and follow the 
    mathematical definition of sets.
  - They behave like valueless dicts.
  - A literal set is represented by `{1,2,3}`