If the first item in the list is not a function you will receive an error message stating: "bad function." The remainder of the list is used as the parameters or arguments to the function. They are functions, symbols, and lists.įunction: is the first item in every list. There are three basic data types in AutoLISP. The interpreter then evaluates, as a list, what is between the opening "(" symbol and the closing ")" symbol. When AutoCAD sees the opening parentheses, it runs the AutoLISP interpreter. The AutoLISP environment is entered when AutoCAD receives a "(" symbol at the command line. AutoLISP Lesson #2 - THE AutoLISP ENVIRONMENT:
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