Search results
Results from the WOW.Com Content Network
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 ).
The relational algebra uses set union, set difference, and Cartesian product from set theory, and adds additional constraints to these operators to create new ones.. For set union and set difference, the two relations involved must be union-compatible—that is, the two relations must have the same set of attributes.
All comparison operators can be overloaded in C++. Since C++20, the inequality operator is automatically generated if operator== is defined and all four relational operators are automatically generated if operator<=> is defined. [1]
This page was last edited on 19 October 2019, at 23:07 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
The Supplemental Mathematical Operators block (U+2A00–U+2AFF) contains various mathematical symbols, including N-ary operators, summations and integrals, intersections and unions, logical and relational operators, and subset/superset relations.
The operator distributes over if it both left distributes and right distributes over . In the definitions above, to transform one side to the other, the innermost operator (the operator inside the parentheses) becomes the outermost operator and the outermost operator becomes the innermost operator.
In computer science, equality is given by some relational operator. Real numbers are often approximated by floating-point numbers (A sequence of some fixed number of digits of a given base, scaled by an integer exponent of that base), thus it is common to store an expression that denotes the real number as to not lose precision.
Most programming languages distinguish between relational and equality operations. The relational article might call out that equality is sometimes viewed as a special case of relational, I think it is worthwhile having two articles (I agree the == is a horrible title). Both articles do need more work. Derek farn 19:38, 19 July 2007 (UTC)