Quad name: Difference between revisions

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A '''quad name''' or ''system name'' is a general term for built-ins denoted by a name beginning with the quad character, <source lang=apl inline>⎕</source>. The term only used when explicitly needing to cover all syntactic classes of such built-ins; constants, variables, objects, functions and operators. It is common to call these ''system constants'', ''system variables'', etc., although the term ''system function'' is often used as a synonym for ''quad name''. Quad names are used for features that abide by the normal syntax, but are not part of the core language. <source lang=apl inline>⎕</source> by itself (standard output/evaluated input) and <source lang=apl inline>⍞</source> (message output/standard input) are often included in the quad name category.