One possible meaning of equality is that 'if a equals b, then either a or b can be used interchangeably in any context without noticing any difference.' But this statement does not necessarily hold, particularly when taking into account mutability together with content equality. It is used in switch statements to dispatch the control flow to the correct branch, and during the unification process in logic programming. It is used to test if an element already exists in a set, or to access to a value through a key. Relational operators can be seen as special cases of logical predicates.Įquality is used in many programming language constructs and data types. In languages such as C, relational operators return the integers 0 or 1, where 0 stands for false and any non-zero value stands for true.Īn expression created using a relational operator forms what is termed a relational expression or a condition. In programming languages that include a distinct boolean data type in their type system, like Pascal, Ada, or Java, these operators usually evaluate to true or false, depending on if the conditional relationship between the two operands holds or not. These include numerical equality ( e.g., 5 = 5) and inequalities ( e.g., 4 ≥ 3). In computer science, a relational operator is a programming language construct or operator that tests or defines some kind of relation between two entities. JSTOR ( March 2022) ( Learn how and when to remove this template message).Unsourced material may be challenged and removed.įind sources: 'Relational operator' – news

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