Scala is a statically-typed, multi-paradigm programming language that runs on the JVM, combining object-oriented and functional programming capabilities into a unified syntax. Designed by Martin Odersky and first released in 2003, Scala provides type inference, immutability by default, and powerful pattern matching, making it particularly well-suited for concurrent and distributed systems. A key insight: Scala's expression-oriented design means nearly everything returns a value — there are no statements, only expressions — which encourages a more functional style and eliminates entire categories of bugs common in statement-based languages.