ORoperaattori

ORoperaattori (OR operator) is a fundamental boolean operator used to combine two logical expressions. The operator yields true if at least one of its operands is true; it yields false only when both operands are false. In Boolean algebra this operator is denoted by the symbol ∨, and in many programming languages it is represented as || for logical OR or as | for bitwise OR. Some languages also use the word or as a keyword.

In logic, OR corresponds to the disjunction operation. The result depends on the truth values of the operands: A ∨ B is true if A is true, or B is true, or both. In digital logic, an OR gate produces a high output whenever any input is high, modeling the same principle as the truth table.

Truth table for A ∨ B:

0 0 -> 0

0 1 -> 1

1 0 -> 1

1 1 -> 1

In programming, there are two related concepts: logical OR and bitwise OR. Logical OR evaluates to a boolean result and often short-circuits (if the first operand is true, the second may not be evaluated). Bitwise OR operates on individual bits of integers and always evaluates both operands. Language-specific details vary: for example, C/C++ uses || for logical OR and | for bitwise OR; Python uses or with short-circuiting but may return non-boolean values; JavaScript uses || with similar short-circuiting semantics.

Precedence and associativity typically place OR below AND and often evaluate left-to-right, though parentheses are recommended to clarify expressions. ORoperaattori is widely used in control flow, conditional expressions, searches, and as a basic operation in many forms of boolean algebra and set theory (as a union operation).