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- Relational_operator abstract "In computer science, a relational operator is a programming language construct or operator that tests or defines some kind of relation between two entities. These include numerical equality (e.g., 5 = 5) and inequalities (e.g., 4 ≥ 3).In programming languages that include a distinct boolean data type in their type system, like Java, these operators return true or false, depending on whether the conditional relationship between the two operands holds or not. In other languages such as C, relational operators return the integers 0 or 1. Some programming languages make a syntactical distinction between the "equals" of assignment (e.g. a = 1 assigns the value 1 to the variable "a") and the "equals" of comparison (if a == 1 then ...). Other languages determine which is meant from context."Greater than" and "less than" comparison of non-numeric data is performed according to a sort convention (such as, for text strings, lexicographical order) which may be built into the programming language and/or configurable by the programmer.When it is desired to associate a numeric value with the result of a comparison between two data items, say "a" and "b", the usual convention is to assign −1 if a < b, 0 if a = b and 1 if a > b. For example, the C function strcmp performs a three-way comparison and returns −1, 0, or 1 according to this convention, and qsort expects the comparison function to return values according to this convention. In sorting algorithms, the efficiency of comparison code is critical since it is one of the major factors contributing to sorting performance.In floating-point arithmetic, numbers, including many simple fractions, cannot be represented exactly, and it may be necessary to test for equality within a given tolerance.Comparison of programmer-defined data types (data types of which the programming language itself has no in-built understanding) may be carried out by custom-written or library functions (such as strcmp mentioned above), or, in some languages, by "overloading" a comparison operator – that is, assigning a programmer-defined meaning that depends on the data types being compared.Sometimes, particularly in object-oriented programming, the comparison raises questions of data types and inheritance, equality and identity. It is often necessary to distinguish between: two objects with different datatypes both related to another datatype, e.g. an orange and a lemon, both being citrus fruit two different objects of the same type, e.g. two hands two objects being equal but distinct, e.g. two $10 banknotes two different references to the same object, e.g. two nicknames for the same personSameness and difference can be relative or graduated as well as absolute, particularly in fuzzy logic, artificial intelligence, signal processing, lossy data compression and pattern recognition.An expression created using a relational operator forms what is known as a relational expression or a condition. Relational operators are also used in technical literature instead of words. Relational operators are usually written in infix notation, if supported by the programming language, which means that they appear between their operands (the two expressions being related). For example, an expression in C will print the message if the x is less than y:Other programming languages, such as Lisp, use prefix notation, as follows:".
- Relational_operator wikiPageID "1202168".
- Relational_operator wikiPageRevisionID "597348839".
- Relational_operator hasPhotoCollection Relational_operator.
- Relational_operator subject Category:Operators_(programming).
- Relational_operator comment "In computer science, a relational operator is a programming language construct or operator that tests or defines some kind of relation between two entities. These include numerical equality (e.g., 5 = 5) and inequalities (e.g., 4 ≥ 3).In programming languages that include a distinct boolean data type in their type system, like Java, these operators return true or false, depending on whether the conditional relationship between the two operands holds or not.".
- Relational_operator label "==".
- Relational_operator label "Operator relacji".
- Relational_operator label "Relational operator".
- Relational_operator label "Vergleichsoperator".
- Relational_operator label "Сравнение (программирование)".
- Relational_operator label "関係演算子".
- Relational_operator sameAs Vergleichsoperator.
- Relational_operator sameAs ==.
- Relational_operator sameAs 関係演算子.
- Relational_operator sameAs Operator_relacji.
- Relational_operator sameAs m.04gwv4.
- Relational_operator sameAs Q2142873.
- Relational_operator sameAs Q2142873.
- Relational_operator wasDerivedFrom Relational_operator?oldid=597348839.
- Relational_operator isPrimaryTopicOf Relational_operator.