Difference between Function and Method

Function 

• Function do not have any reference variables.

• All data that is passed to a function is explicitly  passed.

• It does not have access controlling i.e. Function(other than static functions) declares and defines anywhere in the code.

• Function applies to both object oriented and non-object oriented language(procedural language eg: C, Scripting language eg: Python, JavaScript etc) 

• Function have independent existance means they can be defined outside of the class.

• Function are called independently.

Method 

• Method are called by reference variables.

• It is implicitly passed the object for which it was called.

• It has access controlling i.e. Method should declare and define in the class only.

• Method is only applicable to object oriented programming language like C++, C#, Java etc.

• Method do not have independent existance they are always defined with in class.

• Method are called using instance or object.