Important AUTOLISP BASIC Grammatical structure

Source: Internet
Author: User

Rule 1: The parentheses form the expression, the left and right brackets "(" and ")" must be paired, relative, and the internal string double quotes "" "and" "" should also be paired.

Rule 2: Expression format: (function name operator operator)

* Operation functions include function functions and custom functions.

* Operators (Independent variables) include:

    • integers (integer), such as 8,-17,500,,9999;
    • Real (real), such as 8.5,-17.456;
    • Strings (string), such as: "AutoCAD", "123";
    • Lists (list), such as: ("a" "B" "C"), (x y);
    • Object name code, such as < object name:6340510>;
    • File codes, such as < files: #6562ea0 >;
    • Select the cluster code, such as < selections: #3 >.

Important AUTOLISP BASIC Grammatical structure

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