Parameters: Type, Number, and Order
TLDR: The parameter type, parameter number, and parameter order in a method signature or function signature determine how it can be invoked and distinguished from other methods within the same scope. These attributes are crucial in overloading, where multiple methods share the same name but differ in their parameter list. Ensuring the correct type, number, and order of parameters is essential for accurate method resolution and preventing runtime errors.
https://en.wikipedia.org/wiki/Function_signature
In Java and CPP, parameter types define the expected data types for each argument in a method. For example, a method `calculate(int a, double b)` requires an integer followed by a double. The number of parameters indicates how many arguments the method expects, while their order specifies the sequence in which they must be parameters passed. Overloading relies on unique combinations of these attributes; for instance, `print(int)` and `print(double)` are treated as distinct methods due to differing parameter types.
https://docs.oracle.com/javase/tutorial/java/javaOO/methods.html
The compiler uses these attributes during compile-time resolution to select the correct method for invocation. However, incorrect ordering or mismatched types during method calls can result in compilation errors or unintended behavior. Properly defining and documenting parameter type, number, and order ensures clarity in API design and usability. It also allows developers to leverage features like default arguments and varargs for flexible and intuitive method calls.
https://docs.oracle.com/javase/specs/jls/se20/html/jls-8.html