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BUILT-IN MATHEMATICA SYMBOL
Equal 
returns True if lhs and rhs are identical.
Details
is used to represent a symbolic equation, to be manipulated using functions like Solve. 
returns True if lhs and rhs are ordinary identical expressions. 
returns False if lhs and rhs are determined to be unequal by comparisons between numbers or other raw data, such as strings. - Approximate numbers with machine precision or higher are considered equal if they differ in at most their last seven binary digits (roughly their last two decimal digits).
- For numbers below machine precision the required tolerance is reduced in proportion to the precision of the numbers.
gives True. 
gives True if all the 
are equal. - Equal[e] gives True.
- For exact numeric quantities, Equal internally uses numerical approximations to establish inequality. This process can be affected by the setting of the global variable $MaxExtraPrecision.
- Equal remains unevaluated when lhs or rhs contains objects such as Indeterminate and Overflow.
- In StandardForm and InputForm,
can be input as lhs\[Equal]rhs or 
. - It can also be input as \[LongEqual] or
. - In TraditionalForm,
is output as 
.
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