The operations that may be performed on an ADT completely depend on the ADT’s purpose. For example, an ADT for a stack might include operations such as initialization, pushing data, popping data, ...

Programming C without variables is like, well, programming C without variables. They are so essential to the language that it doesn’t even require an analogy here. We can declare and use them as ...

The rules that apply to the data types in a programming language. Every language supports some number of data types (binary, text string, floating point, etc.) that are processed by the instructions.