Universal types in Scala are represented using type parameters which allow a class or method to operate on any type, providing flexibility and polymorphism.
Existential types in Scala denote the existence of a type without specifying what that type is, with the primary focus on meeting certain constraints.
The Container class exemplifies a universal type, as it operates uniformly with any type, showcasing how generic programming can lead to versatile code.
The key distinction lies in the quantifiers: universal types use 'for all' (∀) while existential types use 'there exists' (∃), impacting their usage in programming.
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