F# by Example: Functions.

	`open System`
Functions are created with the `let` keyword. Parameters for functions are curried and are implicitly typed by the compiler. The last expression in a function will be the returned value	`let add a b = a + b`
You can also explicitly set the types for your parameters	`let multiply (a: int) (b: float) = float a * b`
	`printfn $"{add 1 2}" printfn $"{multiply 2 3.2}"`

$ dotnet fsi functions.fsx
3
6.4