Jetpack Compose is Android's modern declarative UI toolkit — building UIs with composable Kotlin functions instead of XML layouts. It's Google's recommended approach for new Android UI, offering a reactive, concise, and more productive way to build interfaces.
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JETPACK COMPOSE = a declarative UI toolkit (Kotlin code, no XML):
→ describe the UI as COMPOSABLE FUNCTIONS (annotated @Composable)
→ DECLARATIVE + REACTIVE — describe UI for a given state; it updates when state changes
→ Google's RECOMMENDED modern approach (similar philosophy to Flutter, React, SwiftUI)
