BUILT-IN MATHEMATICA SYMBOL

# Unequal

or
returns False if lhs and rhs are identical.

## DetailsDetails

• can be entered as or Esc!=Esc .
• 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->False.
• 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 .

## ExamplesExamplesopen allclose all

### Basic Examples (2)Basic Examples (2)

Returns True if elements are guaranteed unequal, and otherwise stays unevaluated:

 Out[1]=

Enter as != or as Esc!=Esc:

 Out[1]=