Not Match

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Not Match () (sometimes Natch) is the negation of Match. Thus, it returns 0 when its arguments match, and 1 when they do not. Like Match, it is a dyadic primitive function.

Some rendering engines (like Blink, the rendering engine of Chromium based browsers like Chrome, Edge, and Opera) tend to render as ≡/ if the selected font does not have the character (U+2262), but does have (U+2261) and ̸ (U+0338). This issue can be avoided by selecting a font which is more appropriate for APL.


APL built-ins [edit]
Primitive functions
Scalar
Monadic ConjugateNotRollType
Dyadic AddSubtractEqual to (Xnor) ∙ Not Equal to (Xor)
Non-Scalar
Structural ShapeReshapeTallyDepthRavelReverseRazeMixCut (K)Pair
Selection TakeDropUniqueIdentitySelect
Selector Interval Index
Computational MatchNot MatchNub SieveFormatExecute
Primitive operators EachReverse Compose
Quad names
Arrays Index originMigration level
Functions
Operators
Other ZildeHigh minusFunction axis