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In computer programming, a precondition is a condition or predicate that must always be true just prior to the execution of some section of code or before an operation in a formal specification. If a precondition is violated, the effect of the section of code becomes undefined and thus may or may not carry out its intended work.
An interesting property of PRE is that it performs (a form of) common subexpression elimination and loop-invariant code motion at the same time. [1] [2] In addition, PRE can be extended to eliminate injured partial redundancies, thereby effectively performing strength reduction. This makes PRE one of the most important optimizations in ...
In computer science, a preprocessor (or precompiler) [1] is a program that processes its input data to produce output that is used as input in another program. The output is said to be a preprocessed form of the input data, which is often used by some subsequent programs like compilers.
Other pre-declared variables in Perl are %INC and %SIG. Almost all common programming languages provide the programmer with such pre-declared variables in one or another form. When variables are pre-declared, it is commonly assumed that the value for the pre-declared name is also pre-assigned at the same time.
Also simply application or app. Computer software designed to perform a group of coordinated functions, tasks, or activities for the benefit of the user. Common examples of applications include word processors, spreadsheets, accounting applications, web browsers, media players, aeronautical flight simulators, console games, and photo editors. This contrasts with system software, which is ...
They are commonly found in imperative programming languages. C-like languages feature two versions (pre- and post-) of each operator with slightly different semantics. In languages syntactically derived from B (including C and its various derivatives), the increment operator is written as ++ and the decrement operator is written as --. Several ...
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A computer program is a sequence or set [a] of instructions in a programming language for a computer to execute. It is one component of software, which also includes documentation and other intangible components. [1] A computer program in its human-readable form is called source code.