F# (pronounced "F-sharp") is a functional-first programming language that runs on the Microsoft .NET platform. It is designed to be concise, expressive, and efficient, making it suitable for a variety of applications, from web development to data analysis. F# supports both functional and object-oriented programming paradigms, allowing developers to choose the best approach for their projects. One of the key features of F# is its strong type inference, which helps catch errors at compile time rather than runtime. This leads to safer and more reliable code. Additionally, F# has a rich ecosystem of libraries and tools, making it easier for developers to build robust applications quickly.