Does F# have the ternary ?: operator?

Question

I\'m learning F# coming from C# and I\'ve just tried compiling an expression like

let y = Seq.groupBy (fun x -> (x < p ? -1 : x == p ? 0: 1))
         


        

Answer 1

For more examples of C# expressions and statements in F# you can refer to this page. For example:

Ternary operator

C# has the ternary operator "?:" for conditional expressions:

condition ? trueVal : falseVal 

F# has the same operator, but its name is if-then-else:

if condition then trueVal else falseVal

(Note that "if" is used much less frequently in F# than in C#; in F#, many conditionalexpressions are done via pattern-matching rather than if-then-else.)

Switch statement

C# has a switch statement. It looks something like this:

switch (x) 
{ 
    case 1: 
        SomeCode(); 
        break; 
    default: 
        SomeCode(); 
        break; 
} 

In F#, this is just one of many things that pattern matching expresses more succinctly:

    match x with 
     | 1 -> SomeCode() 
     | _ -> SomeCode()  // _ is a ‘catch all’ default