This is documentation for Mathematica 3, which was
based on an earlier version of the Wolfram Language.
 Unequal lhs != rhs or lhsrhs returns False if lhs and rhs are identical. xy can be entered as x \[NotEqual] y or x != y. lhsrhs returns True if lhs and rhs are determined to be unequal by comparisons between numbers or other raw data, such as strings. Approximate numbers are considered unequal if they differ beyond their last two decimal digits. ... gives True only if none of the are equal. 2 3 2. lhsrhs represents a symbolic condition that can be generated and manipulated by functions like Reduce and LogicalExpand. Unequal[ e ] gives True. For exact numeric quantities, Unequal internally uses numerical approximations to establish inequality. This process can be affected by the setting of the global variable \$MaxExtraPrecision. In StandardForm, Unequal is printed using . See the Mathematica book: Section 1.5.6. See also: Equal, UnsameQ, Order. Further Examples See the Further Examples for Equal.