An example of a simple type system is that of the C language. The portions of a C program are the function definitions. One function is invoked by another function. The interface of a … See more

The term polymorphism refers to the ability of code (especially, functions or classes) to act on values of multiple types, or to the ability of different … See more

Many type systems have been created that are specialized for use in certain environments with certain types of data, or for out-of-band static program analysis. Frequently, these are … See more

Formally, type theory studies type systems. A programming language must have the opportunity to type check using the type system … See more

The process of verifying and enforcing the constraints of types—type checking—may occur at compile time (a static check) or at run-time (a dynamic check). If a language specification … See more

Many static type systems, such as those of C and Java, require type declarations: the programmer must explicitly associate each variable with a … See more

Some languages like C# or Scala have a unified type system. This means that all C# types including primitive types inherit from a single root object. Every type in C# inherits from the Object class. Some languages, like Java and Raku, have a root type but also … See more