May 17, 2012 · There is no meaningful difference between operators and functions, except that operators have a different syntax. Primitive operators however are not functions.

Another viewpoint is that operators are primitive constructs of a language, given meaning as part of that language's formal semantics, whereas a function is defined in the language itself.

Loosely, an operator (acting on a function space) takes functions to functions (e.g., f (x) to −if′ (x)). On the other hand, a functional takes functions to numbers (think about a certain integral, or …

Jun 2, 2010 · If you're looking for a more verbose answer, I would go on to mention that operators mostly do not look like functions. And those that do [sizeof and typeid] don't act as functions; …

The difference in declaring a parameter to a function using & and * is that the second one allows a nullptr (or a non-existent or just a plain invalid address) to be passed-in while the & guarantees …

May 30, 2014 · The difference between a ternary operator on $R$ and a function of three arguments on $R$ is the codomain; the former has codomain $R$ (i.e. $R\times R\times R \to …

Function overloading allows multiple functions to have the same name with different parameters, while operator overloading enables custom behaviors for standard operators based on …

May 29, 2020 · Operators have the same domain and codomain, while for a function they may be different. In particular, every operator is a function but a function is not always an operator.

Jul 22, 2013 · But in fact, it's purely a convention with regards to the language: in C++, + is an infix operator (and only operators can be infix), and func() would be a function.

Jul 8, 2012 · The difference between an operator and a function is simply that we've decided to call the operator an operator and we've decided to call the function a function.