Difference between Function and Method
Function vs Method
In the language of programming, two common names will be used over and over. These are ‘function’ and ‘method’. In simple terms, the use of ‘function’ relates to a program component that is required to perform a specific task that it ‘knows’ how to perform. The function takes up an input, does some internal calculations to the input, and then provides a final result, with a change to the naming properties. The main benefit of using a function in programming is that it can be repetitively used to perform different tasks, and does not need reprogramming, as they are expected to return a value.
‘Methods’, on the other hand, are blocks of code which are created to contain a series of statements. These statements will be executed following a program initiating any of the arguments defined in the methods. Below are the differences that have been observed between these two common programming statements. One of the biggest differences between the two is that ‘method’ is only used in cases dealing with object oriented programming language such as Java, C++ and C#.
The use of method is manifested as an object associated with or bound to the same class that the method is in. Function on the other hand applies both to languages that are not object oriented, like C, and languages that are object oriented. The assessment of functions can occur at any point and it is not only limited to the static functions. This is quite different to the access levels that are used in methods which are set to public, private or even protected. Functions also have interdependent existences and for this reason, it is not uncommon to find the presence of functions outside the class; a good example of this is the class Ex:main() function that is seen in C++ and C languages. Methods, on the other hand, don’t have an interdependent existence and have to be defined within the class Ex:-main () which is a method in C#.
When operating with functions, no reference variables are employed. This differs significantly when using methods, which have to be called by their reference variables. All data passing through a function are explicitly passed, while data passing through a method are implicitly passed.
‘Function’ is a segment of code that executes an action and gives out a reply.
‘Method’ is a segment occurring as a series of statements and is executed upon initiation of arguments in the method.
The existence of functions is independent, while methods do not have an independent existence.
Functions are called independently while an instance or object is used to call methods.
The functions are a self-describing unit of code, while methods can be used to manipulate an instance variable of a given class which is of interest.
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