What is a .FSX file?
The file extension .FSX stands for a Visual F# Script File. This type of file contains a script written in F#, which is a programming language developed by Microsoft. F# is known for being a functional programming language and was first introduced in Visual Studio 2010.
An .FSX file is used to write and execute F# scripts directly, without the need to compile the code into a separate file like a .DLL (Dynamic Link Library) or .EXE (Executable file). This makes .FSX files useful for testing or running small pieces of F# code quickly.
To open and run .FSX files, you can use Microsoft Visual Studio, starting from the 2022 version. Within Visual Studio, there is a special component called "F# Interactive" that allows these script files to be executed. You can start F# Interactive by selecting a piece of F# code in Visual Studio and pressing Alt-Enter. This mode executes the script directly and shows the results immediately.
It's important to note that .FSX files are different from .FS files, which are F# source code files. While .FS files need to be compiled into .DLL or .EXE files before they can be run, .FSX files do not require this step and are run as scripts.
Additionally, F# scripts can also have the file extension .FSSCRIPT, which is another format used for F# scripting files.
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