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{{Built-in|Nor|⍱}} is a [[dyadic]] [[scalar function|scalar]] [[boolean function]] which tests if neither argument is true: it returns 1 if both are 0 and 0 if at least one is 1. It represents | {{Built-in|Nor|⍱}} is a [[dyadic]] [[scalar function|scalar]] [[boolean function]] which tests if neither argument is true: it returns 1 if both are 0 and 0 if at least one is 1. It represents Peirce's arrow or [[wikipedia:logical NOR|joint denial]] in Boolean logic. Nor is the [[not|boolean negation]] <source lang=apl inline>~</source> of the [[Or]] function <source lang=apl inline>∨</source>, and so its [[glyph]] is composed from those. However, [[fonts]] vary in how they compose them; some overlaying the glyphs (∨̴), and some stacking them (∨̃). | ||
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=== Documentation === | === Documentation === | ||
* [ | * [https://help.dyalog.com/latest/#Language/Primitive%20Functions/Nor.htm Dyalog] | ||
* [http://microapl.com/apl_help/ch_020_020_440.htm APLX] | * [http://microapl.com/apl_help/ch_020_020_440.htm APLX] | ||
* J [https://www.jsoftware.com/help/dictionary/d102.htm Dictionary], [https://code.jsoftware.com/wiki/Vocabulary/plusco#dyadic NuVoc] | * J [https://www.jsoftware.com/help/dictionary/d102.htm Dictionary], [https://code.jsoftware.com/wiki/Vocabulary/plusco#dyadic NuVoc] | ||
{{APL built-ins}}[[Category:Primitive functions]][[Category:Scalar dyadic functions]] | {{APL built-ins}}[[Category:Primitive functions]][[Category:Scalar dyadic functions]] | ||