Equal

Equal(x, y)

x == y

yields True if x and y are known to be equal, or False if x and y are known to be unequal.

lhs == rhs

represents the equation lhs = rhs.

See

• Wikipedia - Computer algebra - Equality

Examples

>> a==a
True

>> a==b
a == b

>> 1==1
True

Lists are compared based on their elements:

>> {{1}, {2}} == {{1}, {2}}
True
>> {1, 2} == {1, 2, 3}
False

Symbolic constants are compared numerically:

>> E > 1
True

>> Pi == 3.14
False

>> Pi ^ E == E ^ Pi
False

>> N(E, 3) == N(E)
True

>> {1, 2, 3} < {1, 2, 3}
{1, 2, 3} < {1, 2, 3}

>> E == N(E)
True

>> {Equal(Equal(0, 0), True), Equal(0, 0) == True}
{True, True}

>> {Mod(6, 2) == 0, Mod(6, 4) == 0, (Mod(6, 2) == 0) == (Mod(6, 4) == 0), (Mod(6, 2) == 0) != (Mod(6, 4) == 0)}
{True,False,False,True}

>> a == a == a
True

>> {Equal(), Equal(x), Equal(1)}
{True, True, True}

Related terms

SameQ, Unequal, UnsameQ

Implementation status

• ✅ - full supported

Github

• Implementation of Equal