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relational operator
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 Pascal, Ada or Java, these operators usually evaluate to true or false, depending on whether the conditional relationship between the two operands holds or not. In languages such as C, relational operators return the integers 0 or 1, where 0 stands for false and any nonzero value stands for true.
An expression created using a relational operator forms what is known as a ''relational expression'' or a ''condition''.
Relational operators can be seen as special cases of logical predicates.
==Equality==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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