Real-World Functional Programming

Quick Reference – F# Language Constructs

Primitive Expressions

sin(3.1415)	Calling a single-parameter function (parentheses optional)
max 2 4	Calling a function with multiple parameters (3.1.2, 5.5.3)
fst(2, "two")	Calling a function that takes parameters as a tuple (4.4.2)
new System.Random()	Creating an instance of an F# (9.4) or .NET object (4.4.1)
rnd.Next()	Calling an F# member (9.4) or .NET method (4.4.2)
fun a -> a + 10	Creating a function using the lambda syntax (3.4, 5.5.1)
(3, "three")	Creating a tuple value with two members (3.2.1, 5.2)
()	Tuple with zero members; also called unit value (3.1)
Some(10)	Creating a value of a discriminated union (5.3.4)
rnd :> Object	Safe type conversion ...