F# User Defined Exceptions

by Online Tutorials Library July 14, 2022

F# User Defined Exceptions

In F#, you can create user defined exception. It provides flexibility to define custom exceptions according to requirement. Let’s see an example.

  exception InvalidAgeException of string  let validate x =      if (x < 18) then        raise (InvalidAgeException “Sorry, Age must be greater than 18”)     let TestUserDefinedException =     try         validate 15     with         | InvalidAgeException(e) -> printfn “%s” e     printfn “Rest of the code”    TestUserDefinedException  

Output:

Sorry, Age must be greater than 18  Rest of the code

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