Call a function: Difference between revisions

=={{header|ALGOL 68}}==

<lang algol68># A function without arguments: #

f();

# A function with a fixed number of arguments: #

f(1, x);

# ALGOL 68 does not support optional arguments, variable numbers of arguments, or named arguments. #

# In "Talk:Call a function" a statement context is explained as "The function is used as an instruction (with a void context),

rather than used within an expression." Based on that, both ALGOL examples above are already in a statement context.

For full ALGOL compatibility, though, they should be in the form "VOID (f ());" #

# A function's return value being used: #

x := f(y);

# There is no distinction between built-in functions and user-defined functions. #

# A subroutine is simply a function that returns VOID. #

# If the function is declared with argument(s) of mode REF MODE, then those arguments are being passed by reference. #</lang>

See [http://rosettacode.org/wiki/First-class_functions#ALGOL_68 First-Class Functions] for an example of first-class functions in ALGOL 68.

See [http://rosettacode.org/wiki/Partial_function_application#ALGOL_68 Partial Function Application] for an example of partial function application in ALGOL 68.