### 18.1.2. User CEL Function Units

On entry into a user CEL function routine, the arguments are automatically converted into the units specified in the Argument List list in the User Function Editor (labeled `Argument List` in the definition for the function in the CCL file `LIBRARY` section).

On exit, the results are automatically converted from the Result Units into the solution units used by the CFX-Solver.

This ability to choose the working units for the routine with automatic conversion may be useful for creating interfaces between the CFX-Solver and third-party data or applications.

Release 18.2 - © ANSYS, Inc. All rights reserved.