Function Overloading is a feature.
The ability to create multiple functions of the same name with different implementations. Calls to an overloaded function will run a specific implementation of that function appropriate to the context of the call, allowing one function call to perform different tasks depending on context. This is a type of polymorphism.
Languages without Function Overloading include JavaScript, Ruby, Jule
Languages with Function Overloading include C++, Pascal
// volume of a cube
int volume(const int s) {
return s*s*s;
}
// volume of a cylinder
double volume(const double r, const int h) {
return 3.1415926*r*r*static_cast<double>(h);
}
program Adhoc;
function Add(x, y : Integer) : Integer;
begin
Add := x + y
end;
function Add(s, t : String) : String;
begin
Add := Concat(s, t)
end;
begin
Writeln(Add(1, 2)); (* Prints "3" *)
Writeln(Add('Hello, ', 'World!')); (* Prints "Hello, World!" *)
end.