4. Functions

Functions are a block of reusable code that accept input parameters (arguments) and produce an output value (return value). Functions can also include modifier keywords that alter or extend their behaviour.

Invoking Functions

Functions can be static or instance-based. Static functions can be invoked directly without reference to an object:

Add(1, 3);

Instance-based functions require an instance of the owning type to be invoked:

Maths maths = new Maths();
maths.Add(1, 3);