DocumentationMathematicaBuilt-in FunctionsProgrammingTests
UnsameQ
lhs =!= rhs yields True if the expression lhs is not identical to rhs, and yields False otherwise.
See notes for SameQ. =!= =!= gives True if no two of the are identical. See Section 2.3.5. See also: Equal, Order. New in Version 2.
Further Examples
lhs =!= rhs yields True if the expression lhs is not identical to rhs, and yields False otherwise. 
=!= 
=!= 
gives True if no two of the 
are identical. 
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