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  "title" : "NSLayoutConstraint.Relation"
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# NSLayoutConstraint.Relation

The relation between the first attribute and the modified second attribute in a constraint.

```
enum Relation
```

## Topics

### Constants

[`NSLayoutConstraint.Relation.lessThanOrEqual`](/documentation/AppKit/NSLayoutConstraint/Relation-swift.enum/lessThanOrEqual)

The constraint requires the first attribute to be less than or equal to the modified second attribute.

[`NSLayoutConstraint.Relation.equal`](/documentation/AppKit/NSLayoutConstraint/Relation-swift.enum/equal)

The constraint requires the first attribute to be exactly equal to the modified second attribute.

[`NSLayoutConstraint.Relation.greaterThanOrEqual`](/documentation/AppKit/NSLayoutConstraint/Relation-swift.enum/greaterThanOrEqual)

The constraint requires the first attribute to be greater than or equal to the modified second attribute.


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