undefined variable

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• Undefined variable — An undefined variable in the source code of a computer program is a variable that is accessed in the code but has not been previously declared by that code.In some programming languages an implicit declaration is provided the first time such a… …   Wikipedia

• undefined variable — neapibrėžtas kintamasis statusas T sritis informatika apibrėžtis ↑Kintamasis, kurio reikšmė neapibrėžta. Kai programa pradedama vykdyti, pirmiausia joje aprašytiems kintamiesiems paskiriama vieta atmintyje. O toje vietoje gali būti anksčiau ją… …   Enciklopedinis kompiuterijos žodynas

• Variable — A variable (pronEng|ˈvɛərɪəbl) is an attribute of a physical or an abstract system which may change its value while it is under observation. Examples include the height of a child, the temperature across a state, or the input to a function. This… …   Wikipedia

• Variable-Data Intelligent PostScript Printware — ist eine Seitenbeschreibungssprache, die von Xerox entwickelt wurde. Die Sprache basiert auf PostScript und ermöglicht die Trennung zwischen variablen und fixen Bestandteilen einer zu druckenden Seite. Der Vorteil besteht in einem geringeren… …   Deutsch Wikipedia

• Undefined behavior — In computer programming, undefined behavior is a feature of some programming languages most famously C.[1] In these languages, to simplify the specification and allow some flexibility in implementation, the specification leaves the results of… …   Wikipedia

• Automatic variable — In the C programming language= Variables declared within a block of code are, by default, automatic variables. This means that when the block is entered during program execution, the automatic variables will be automatically allocated; when the… …   Wikipedia

• Declaration (computer programming) — In programming languages, a declaration specifies the identifier, type, and other aspects of language elements such as variables and functions. It is used to announce the existence of the element to the compiler; this is important in many… …   Wikipedia

• Autovivification — is a unique feature of the Perl programming language involving the dynamic creation of data structures. Autovivification is the automatic creation of a reference when an undefined value is dereferenced. In effect, this causes access to an element …   Wikipedia

• WATFIV (programming language) — WATFIV, or WATerloo FORTRAN IV, developed at the University of Waterloo, Canada is an implementation of Fortran IV. It is the successor of WATFOR.WATFIV was in turn succeeded by later versions of WATFOR. WATFIV was used from the late 1960s into… …   Wikipedia

• Reference electrode — Reference electrodeis an electrode which has a stable and well known electrode potential.The high stability of the electrode potential is usually reached by employing a redox system with constant (buffered or saturated) concentrations of each… …   Wikipedia

• open sentence — noun : a statement (as in mathematics) that contains at least one blank or unknown and that becomes true or false when the blank is filled or a quantity is substituted for the unknown * * * 1. Math. an equation or inequality containing one or… …   Useful english dictionary