User-defined Function
A User-Defined Function (UDF) is a function provided by the user of a program or environment, in a context where the usual assumption is that functions are built into the program or environment.
Read more about User-defined Function: BASIC Language, Databases
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“Nobody seriously questions the principle that it is the function of mass culture to maintain public morale, and certainly nobody in the mass audience objects to having his morale maintained.”
—Robert Warshow (1917–1955)