https://RustRocket.rs -- Cloud Monk Losang Jinpa, Ph.D., MCSE / MCT, https://Rustaceans.rs, Full Stack Cloud Native Rust DevOps Engineer - Rocket Framework Rust Microservices on Kubernetes-AWS-Azure-GCP

Return to Function definition

Snippet from Wikipedia: Function (computer programming)

In computer programming, a function (also procedure, method, subroutine, routine, or subprogram) is a callable unit of software logic that has a well-defined interface and behavior and can be invoked multiple times.

Callable units provide a powerful programming tool. The primary purpose is to allow for the decomposition of a large and/or complicated problem into chunks that have relatively low cognitive load and to assign the chunks meaningful names (unless they are anonymous). Judicious application can reduce the cost of developing and maintaining software, while increasing its quality and reliability.

Callable units are present at multiple levels of abstraction in the programming environment. For example, a programmer may write a function in source code that is compiled to machine code that implements similar semantics. There is a callable unit in the source code and an associated one in the machine code, but they are different kinds of callable units – with different implications and features.

Creative Commons Attribution-Share Alike 4.0

Snippet from Wikipedia: Method (computer programming)

A method in object-oriented programming (OOP) is a procedure associated with an object, and generally also a message. An object consists of state data and behavior; these compose an interface, which specifies how the object may be used. A method is a behavior of an object parametrized by a user.

Data is represented as properties of the object, and behaviors are represented as methods. For example, a Window object could have methods such as open and close, while its state (whether it is open or closed at any given point in time) would be a property.

In class-based programming, methods are defined within a class, and objects are instances of a given class. One of the most important capabilities that a method provides is method overriding - the same name (e.g., area) can be used for multiple different kinds of classes. This allows the sending objects to invoke behaviors and to delegate the implementation of those behaviors to the receiving object. A method in Java programming sets the behavior of a class object. For example, an object can send an area message to another object and the appropriate formula is invoked whether the receiving object is a rectangle, circle, triangle, etc.

Methods also provide the interface that other classes use to access and modify the properties of an object; this is known as encapsulation. Encapsulation and overriding are the two primary distinguishing features between methods and procedure calls.

Creative Commons Attribution-Share Alike 4.0

• function declaration on gnu.org/software/bash
• Bash function declaration on DuckDuckGo
• Bash function declaration on StackOverflow
• Bash function declaration on GitHub

• function declaration on ISO-9899.info
• C Language function declaration on CppReference.com
• C Language function declaration on DuckDuckGo
• C Language function declaration on StackOverflow
• C Language function declaration on GitHub

• function declaration on CPlusPlus.com
• function declaration on CppReference.com
• function declaration ISOcpp.org
• C++ function declaration on DuckDuckGo
• C++ function declaration on StackOverflow
• C++ function declaration on GitHub

• function declaration on C-SharpCorner.com
• C Sharp function declaration on DuckDuckGo
• CSharp function declaration on StackOverflow
• CSharp function declaration on GitHub

• function declaration on ClojureDocs.org
• Clojure function declaration on DuckDuckGo
• Clojure function declaration on StackOverflow
• Clojure function declaration on GitHub

• function declaration on MicroFocus.com/documentation/visual-cobol
• COBOL function declaration on IBM.com/docs
• COBOL function declaration on IBMmainframer.com
• COBOL function declaration on DuckDuckGo
• COBOL function declaration on StackOverflow
• COBOL function declaration on GitHub

• function declaration on Dart.Dev
• Dart function declaration on DuckDuckGo
• Dart function declaration on StackOverflow
• Dart function declaration on GitHub

• function declaration on Elixir-Lang.org
• Elixir function declaration on DuckDuckGo
• Elixir function declaration on StackOverflow
• Elixir function declaration on GitHub

• function declaration on Fortran-Lang.org
• function declaration on StdLib.Fortran-Lang.org
• function declaration on WG5-Fortran.org
• Fortran function declaration on IBM.com/docs
• Fortran function declaration on IBMmainframer.com
• Fortran function declaration on DuckDuckGo
• Fortran function declaration on StackOverflow
• Fortran function declaration on GitHub

• function declaration on Golang.org
• Golang function declaration on DuckDuckGo
• Golang function declaration on StackOverflow
• Golang function declaration on GitHub

• function declaration on Docs.Groovy-lang.org
• Groovy function declaration on DuckDuckGo
• Groovy function declaration on StackOverflow
• Groovy function declaration on GitHub

• function declaration on Haskell.org
• Haskell function declaration on DuckDuckGo
• Haskell function declaration on StackOverflow
• Haskell function declaration on GitHub

• REXX function declaration on IBM.com/docs
• REXX function declaration on IBMmainframer.com
• REXX function declaration on DuckDuckGo
• REXX function declaration on StackOverflow
• REXX function declaration on GitHub

• JCL function declaration on IBM.com/docs
• JCL function declaration on IBMmainframer.com
• IBM JCL function declaration on DuckDuckGo
• IBM JCL function declaration on StackOverflow
• JCL function declaration on GitHub

• Java function declaration on Docs.Oracle.com
• function declaration on Baeldung.com
• function declaration on JavaSpecialists.eu
• Java function declaration on DuckDuckGo
• Java function declaration on StackOverflow
• Java function declaration on GitHub

• function declaration on Developer.Mozilla.org
• JavaScript function declaration on DuckDuckGo
• JavaScript function declaration on StackOverflow
• JavaScript function declaration on GitHub

• function declaration on KotlinLang.org
• Kotlin function declaration on DuckDuckGo
• Kotlin function declaration on StackOverflow
• Kotlin function declaration on GitHub

• function declaration on PHP.net
• PHP function declaration on DuckDuckGo
• PHP function declaration on StackOverflow
• PHP function declaration on GitHub

• function declaration on Docs.Microsoft.com/en-us/powershell
• PowerShell function declaration on DuckDuckGo
• PowerShell function declaration on StackOverflow
• PowerShell function declaration on GitHub

• function declaration on Python.org
• Python function declaration on DuckDuckGo
• Python function declaration on StackOverflow
• Python function declaration on GitHub

• function declaration on Ruby-Lang.org
• Ruby function declaration on DuckDuckGo
• Ruby function declaration on StackOverflow
• Ruby function declaration on GitHub

• function declaration on Rust-Lang.org
• Rust function declaration on DuckDuckGo
• Rust function declaration on StackOverflow
• Rust function declaration on GitHub

• function declaration on Scala-Lang.org
• Scala function declaration on DuckDuckGo
• Scala function declaration on StackOverflow
• Scala function declaration on GitHub

• function declaration on Swift.org
• Swift function declaration on DuckDuckGo
• Swift function declaration on StackOverflow
• Swift function declaration on GitHub

• function declaration on Docs.Microsoft.com/en-us/sql/t-sql
• T-SQL function declaration on DuckDuckGo
• T-SQL function declaration on StackOverflow
• T-SQL function declaration on GitHub

• function declaration on TypeScriptlang.org
• TypeScript function declaration on DuckDuckGo
• TypeScript function declaration on StackOverflow
• TypeScript function declaration on GitHub

• function declaration on DuckDuckGo
• function declaration on StackOverflow
• function declaration on GitHub
• function declaration on O'Reilly

Snippet from Wikipedia: Declaration (computer programming)

In computer programming, a declaration is a language construct specifying identifier properties: it declares a word's (identifier's) meaning. Declarations are most commonly used for functions, variables, constants, and classes, but can also be used for other entities such as enumerations and type definitions. Beyond the name (the identifier itself) and the kind of entity (function, variable, etc.), declarations typically specify the data type (for variables and constants), or the type signature (for functions); types may also include dimensions, such as for arrays. A declaration is used to announce the existence of the entity to the compiler; this is important in those strongly typed languages that require functions, variables, and constants, and their types to be specified with a declaration before use, and is used in forward declaration. The term "declaration" is frequently contrasted with the term "definition", but meaning and usage varies significantly between languages; see below.

Declarations are particularly prominent in languages in the ALGOL tradition, including the BCPL family, most prominently C and C++, and also Pascal. Java uses the term "declaration", though Java does not require separate declarations and definitions.

Creative Commons Attribution-Share Alike 4.0

All of the items below redirect to function declaration

• function declarations
• declarations of functions
• declarations of function
• declaration of functions
• declaration of function
• declaration of a function
• declaring functions
• declaring a function
• declare functions
• declare a function
• functions are declared
• function is declared