Reflectance values express the percentage of light that is reflected back from a surface, the difference having been absorbed or transmitted by the surface. Reflectances of room surfaces are used in determining coefficient of utilization values for luminaires.
The last three lines show you how to define your own awk function. The format is simple -- type function, then the function name, and then the parameters separated by commas, inside parentheses. After this, a { } code block contains the code that you'd like this function to execute.
Definition of hock for Students. 1  1 : a small piece of meat from the leg of a pig ham hocks. 2  2 : the part of the rear leg of a four-footed animal that is like a human ankle.