requiredand

Requiredand is a term used in documentation and tutorials to describe a composite mandatory constraint, requiring all specified conditions or fields to be satisfied. It is a portmanteau of "required" and "and" and is not a standardized operator in mainstream programming languages; instead, it serves as a descriptive label for a conjunction of mandatory requirements.

Semantics: In practice, requiredand functions as a logical conjunction over a set of predicates or fields. The overall constraint evaluates to true only if every operand is satisfied. If any operand is missing or fails, the constraint fails, and validation stops.

Usage: It is commonly introduced in the context of form validation, data schemas, or constraint languages to express that both X and Y must be provided rather than either one. It can be conditional—e.g., requiredand(A, B) may apply only when a separate condition C holds.

Example: Pseudo-code: if requiredand(A, B) then accept; else reject. In many languages this is implemented as a conjunction: A is present AND B is present. In schemas, it might be expressed as a constraint requiring multiple required fields to be present together.

Notes: As a term, requiredand is informal and not part of standard syntax in major languages. It is most useful as a pedagogical aid for describing composite mandatory constraints. See also: logical AND, required field, constraint programming, data validation.