Icon+Unicon/Intro: Difference between revisions
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Files and windows (mutable) allow Icon/Unicon to interface with the operating system. Operations on files and windows have side effects and they are considered mutable. Sockets and pipes are also implemented as "files". |
Files and windows (mutable) allow Icon/Unicon to interface with the operating system. Operations on files and windows have side effects and they are considered mutable. Sockets and pipes are also implemented as "files". |
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=== Keywords === |
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Icon and Unicon has a list of special variables known as keywords. Syntactically, keywords are variable names preceeded by an &.. |
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Keywords can be used to inquire about the current state of the program, as constants, and to modify the operation (tracing and error control). For a list of keywords see [[Special_variables#Icon_and_Unicon]]. |
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== Operators and Procedures == |
== Operators and Procedures == |
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