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# ord_symdiff(+Set1, +Set2, -Difference)

Computes the symmetric difference of Set1 and Set2
*Set1*
- A set
*Set2*
- A set
*Difference*
- A set or variable

## Description

Succeeds when Difference is the symmetric difference of Set1 and Set2.
These are the elements that occur either only in Set1 or only in Set2,
but not both.
### Modes and Determinism

- ord_symdiff(+, +, -) is det

## See Also

ord_subtract / 3