Call a function: Difference between revisions

=={{header|AutoHotkey}}==

<lang AHK>; Call a function without arguments:

f()

; Call a function with a fixed number of arguments:

f("string", var, 15.5)

; Call a function with optional arguments:

f("string", var, 15.5)

; Call a function with a variable number of arguments:

f("string", var, 15.5)

; Call a function with named arguments:

; AutoHotkey does not have named arguments. However, in v1.1+,

; we can pass an object to the function:

f({named: "string", otherName: var, thirdName: 15.5})

; Use a function in statement context:

f(1), f(2) ; What is statement context?

; No first-class functions in AHK

; Obtaining the return value of a function:

varThatGetsReturnValue := f(1, "a")

; Cannot distinguish built-in functions

; Subroutines are called with GoSub; functions are called as above.

; Subroutines cannot be passed variables

; Stating whether arguments are passed by value or by reference:

; [v1.1.01+]: The IsByRef() function can be used to determine

; whether the caller supplied a variable for a given ByRef parameter.

; A variable cannot be passed by value to a byRef parameter. Instead, do this:

f(tmp := varIdoNotWantChanged)

; the function f will receive the value of varIdoNotWantChanged, but any

; modifications will be made to the variable tmp.

; Partial application is impossible.

</lang>