Swift

Swift is an open-source, compiled programming language: it's fast, safe, and expressive for building apps across all Apple platforms and beyond.

Swift is a powerful, multi-paradigm language, originally launched by Apple in 2014 to replace C-based languages for their ecosystem. It was engineered for performance, leveraging the LLVM compiler to produce lightning-fast, optimized machine code. The design prioritizes safety: features like Automatic Reference Counting (ARC) and explicit handling of optionals eliminate entire classes of common bugs (e.g., null pointer dereferencing). Now open-source under the Apache 2.0 license, Swift (current stable version 6.2.1) is the primary language for iOS, macOS, and watchOS development, with growing adoption for server-side and Linux applications.

https://www.swift.org