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Algebraic types are a fundamental programming concept that combines types using product types (like structs containing multiple values) and sum types (values that can be one of several alternatives). The article explains how these concepts relate to basic algebra, demonstrates practical applications through an arithmetic expression interpreter, and compares algebraic types to object-oriented alternatives like inheritance and the visitor pattern. Examples show how sum types can prevent common programming errors and make code more maintainable.

Algebraic Types are not Scary, Actually

Algebraic Types are Just Elementary School Algebra