Logical negation operator in F#? (!-equivalent)

Question

What is the equivalent to the C# "!" operator in F#?

Thanks, Jacob

Answer 1

According to "Foundations of F#", page 61:

F# uses a function called not for Boolean "not" operations.

Answer 2

See

http://research.microsoft.com/fsharp/manual/FSharp.Core/Microsoft.FSharp.Core.Operators.html

for more.

Answer 3

you can also use "<>"