A function-name specifies the mechanism provided to determine the value of an intrinsic function Start of changeor a user-defined functionEnd of change.

The same word, in a different context, can appear in a program as a user-defined word or a system name. For a list of intrinsic function names and their definitions, see Table 1.

Start of changeIntrinsic function names may be used as user-defined function-names, except for LENGTH, RANDOM, SIGN, SUM, and WHEN-COMPILED.End of change