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Equal ()

lhs

rhs
returns True if lhs and rhs are identical.

MORE INFORMATION

lhsrhs is used to represent a symbolic equation, to be manipulated using functions like Solve.

lhsrhs returns True if lhs and rhs are ordinary identical expressions.

lhsrhs 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.

22. gives True.

e₁e₂e₃ gives True if all the e_i 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, lhsrhs can be input as lhs\[Equal]rhs or lhs=rhs.

It can also be input as \[LongEqual] or lhsrhs.

In TraditionalForm, lhsrhs is output as lhsrhs.

Basic Examples (2)

Test equality:

Represent an equation:

Properties & Relations (6)

Possible Issues (5)

SameQ Unequal Equivalent KroneckerDelta PossibleZeroQ Order Element Reduce Simplify

Equations

Relational and Logical Operators

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