[OpenMesh] OpenMesh - Adding data to a face

Hello again, I am trying to add a float data type to each face in my mesh. I am following the storing custom properties tutorial but I am a little confused on how to assign each face with an actual value. For example: OpenMesh::FPropHandleT<float> fprop_float; mesh.add_property(fprop_float, "fprop_float"); mesh.property(fprop_float).set_persistent(true); mesh.face(mesh.face_handle(1)) = 1.12; Thank you very much for your help and quick responses. - William