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 'perk'. perk (pÉËÊ³k ) Perks are special benefits that are given to people who have a particular job or belong to a particular group. ...a company car, private medical insurance and other perks. One of the perks of being a student is cheap travel.