In programming, a **type variable** is a placeholder for a type that can be specified later. Type variables are often used in generic programming to allow functions, classes, or interfaces to operate on types that are not specified until the code is invoked or instantiated. This allows for greater flexibility and reusability of code. ### Key Concepts: 1. **Generics**: Type variables are commonly used in languages that support generics (e.g., Java, C#, TypeScript, etc.).
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