Returns the read-only state of an entity’s property.
ename propertyname [or collectionName index name]
Name of the entity being queried. The ename can refer to either a graphical or a non-graphical entity.
Name of the property being queried. For a list of all the valid property names of a given object, use dumpallproperties.
If the object is a collection object, the Collection name is passed here.
The collection index being queried.
The name of the property within the collection being queried.
1 is returned when the property is read-only; otherwise, 0 is returned when the property is writable.
The following example demonstrates how to check the read-only state of the Radius and Area properties of a circle.
Command: (setq e1 (car (entsel "\nSelect an arc or circle: ")))
<Entity name: 10e2e4ba0>
Command: (ispropertyreadonly e1 "Radius")
Command: (ispropertyreadonly e1 "Area")