Wolfram Language & System 11.0 (2016)|Legacy Documentation
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lhs!=rhs or lhs≠rhs
returns False if lhs and rhs are identical.
- can be entered as x∖[NotEqual]y or x Esc!=Esc y.
- lhs≠rhs 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 ei are equal. 2≠3≠2->False.
- lhs≠rhs 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 ≠.
Introduced in 1988
(1.0)| Updated in 1996