f#3

// Exercise 3.2 – Some List functions
// a. Define a function pmLength ls that computes the length of a list. Use pattern matching.
// For example, pmLength [‘x’; ‘y’; ‘z’ ] should return 3.












// b. Define a function pclSum ls that sums all the numbers in a list. For example, pclSum [2; 3; 5; 8 ] should return 18.


open System

 let pclSum (ls) : int=
    List.reduce(+) ls

 printfn "%i" (pclSum([1;2;3;4;5]))

Console.ReadKey() |> ignore



// Exercise 3.3 – Lists
// Define a function, takeSome n ls that returns list of first n elements from the list ls.
// Define the function using pattern matching:
// Example takeSome 2 ['a';'b'; 'c'; 'd'] should return ['a'; 'b'].











// Exercise 4.1 – List functions
// a. Define the function pclFold . Use pattern matching. You are not allowed to use the standard F# functions.