Data commit

Task/Call-a-function/F-Sharp/call-a-function.fs

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+// No arguments
+noArgs()
+
+// Fixed number of arguments
+oneArg x
+
+// Optional arguments
+// In a normal function:
+optionalArgs <| Some(5) <| None
+// In a function taking a tuple:
+optionalArgsInTuple(Some(5), None)
+// In a function in a type:
+foo.optionalArgs 5;;
+// However, if you want to pass more than one paramter, the arguments must be
+// passed in a tuple:
+foo.optionalArgs(5, 6)
+
+// Function with a variable number of arguments
+variableArgs 5 6 7 // etc...
+
+// Named arguments can only be used in type methods taking a tuple. The
+// arguments can appear in any order.
+foo.namedArgs(x = 5, y = 6)
+
+// Using a function in a statement
+for i = 0 to someFunc() do
+    printfn "Something"
+
+// Using a function in a first-class context
+funcArgs someFunc
+
+// Obtaining a return value
+let x = someFunc()
+
+// Built-in functions: do functions like (+) or (-) count?
+
+// Parameters are normally passed by value (as shown in the previous examples),
+// but they can be passed by reference.
+// Passing by reference:
+refArgs &mutableVal
+
+// Partial application example
+let add2 = (+) 2