Chapter 3Calculating and Working with Values
Many of the standard AutoCAD® commands perform a lot of calculations as they are used from the user interface, but much of this work is shifted to you as a programmer when you work with AutoLISP®. AutoLISP supports a variety of functions that allow you to perform basic and complex math calculations, manipulate numeric or string values, and work with the elements contained in a list. I cover working with lists in Chapter 4, “Working with Lists.”
Although many of the math and data-manipulation functions in AutoLISP provide a solid foundation for working with values, you might need to combine many of these functions to create custom functions that return a value. In Chapter 2, “Understanding AutoLISP,” ...
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