open FStar.Interactive;
printfn "Hello World!"
Explanation:
In this example, we are using the F# interactive REPL (Read-Eval-Print Loop) to write a simple “Hello World” program in the F* programming language. To do this, we first need to open the necessary module for providing an interactive environment with printing capabilities.
Next, we simply use the printfn function from the System library to print the string “Hello World!” to the console. The ‘f’ in fsharp is just a convention used to indicate that this is F# code, and it is often used when writing F# programs that interoperate with other .NET languages or libraries.
Overall, you can simply copy and paste the above code into an F# interactive session (such as FSI) or into an .fs file and run it to see “Hello World!” outputted to the console.
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