Type hierarchy
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What is Type hierarchy?
Generic types allow you to write code that can work with different types while maintaining type safety. Generic classes and traits take a type as a parameter within square brackets. For example, Stack[A] is a generic class that can be used to create stacks of any type A. Scala's type hierarchy is unified, with Any as the top type, which is the supertype of all types, and Nothing as the bottom type, which is the subtype of all types.
Free resources to learn Type hierarchy
More in stage 5: Conditionals
Type hierarchy: common questions
Can I learn Type hierarchy in Hindi?
This lesson is written in English. Once you sign in, open it in the interactive course and ask the AI tutor to explain Type hierarchy in Hindi or Hinglish. The tutor answers from this lesson’s own text, so it stays on the syllabus, and it runs on your own Google, OpenAI or Anthropic key.
Is this Type hierarchy tutorial for beginners?
It is lesson 22 of 165 in the free Scala roadmap, in stage 5, Conditionals. If you are new to Scala, start from stage 1 and come back here in order; if you already know the earlier stages, this lesson stands on its own.