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  2. Value (computer science) - Wikipedia

    en.wikipedia.org/wiki/Value_(computer_science)

    Some languages use the idea of l-values and r-values, deriving from the typical mode of evaluation on the left and right-hand side of an assignment statement. An l-value refers to an object that persists beyond a single expression. An r-value is a temporary value that does not persist beyond the expression that uses it. [5]

  3. CYK algorithm - Wikipedia

    en.wikipedia.org/wiki/CYK_algorithm

    Now the sentence she eats a fish with a fork is analyzed using the CYK algorithm. In the following table, in P [ i , j , k ] {\displaystyle P[i,j,k]} , i is the number of the row (starting at the bottom at 1), and j is the number of the column (starting at the left at 1).

  4. Assignment (computer science) - Wikipedia

    en.wikipedia.org/wiki/Assignment_(computer_science)

    For example, one such method that would give the class it appears in the same behavior as the return value of f() above would be void Deconstruct ( out string a , out int b ) { a = "foo" ; b = 1 ; } In C and C++, the comma operator is similar to parallel assignment in allowing multiple assignments to occur within a single statement, writing a ...

  5. Sentinel value - Wikipedia

    en.wikipedia.org/wiki/Sentinel_value

    A set most significant bit in a stream of equally spaced data values, for example, a set 8th bit in a stream of 7-bit ASCII characters stored in 8-bit bytes indicating a special property (like inverse video, boldface or italics) or the end of the stream. A negative integer for indicating the end of a sequence of non-negative integers.

  6. Programming language - Wikipedia

    en.wikipedia.org/wiki/Programming_language

    This is an accepted version of this page This is the latest accepted revision, reviewed on 6 February 2025. Language for communicating instructions to a machine The source code for a computer program in C. The gray lines are comments that explain the program to humans. When compiled and run, it will give the output "Hello, world!". A programming language is a system of notation for writing ...

  7. Valuation (logic) - Wikipedia

    en.wikipedia.org/wiki/Valuation_(logic)

    In mathematical logic (especially model theory), a valuation is an assignment of truth values to formal sentences that follows a truth schema. Valuations are also called truth assignments. In propositional logic, there are no quantifiers, and formulas are built from propositional variables using logical connectives.

  8. Comma operator - Wikipedia

    en.wikipedia.org/wiki/Comma_operator

    The comma operator separates expressions (which have value) in a way analogous to how the semicolon terminates statements, and sequences of expressions are enclosed in parentheses analogously to how sequences of statements are enclosed in braces: [1] (a, b, c) is a sequence of expressions, separated by commas, which evaluates to the last expression c, while {a; b; c;} is a sequence of ...

  9. Context-free grammar - Wikipedia

    en.wikipedia.org/wiki/Context-free_grammar

    An essential property of these block structures is that logical units never overlap. For example, the sentence: John, whose blue car was in the garage, walked to the grocery store. can be logically parenthesized (with the logical metasymbols [ ]) as follows: [John[, [whose [blue car]] [was [in [the garage]]],]] [walked [to [the [grocery store]]]].