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Line 3: IMP is [[expression-oriented (programming)\|expression-oriented]]: there is no distinction between common expressions and [[statement (programming)\|statement]]s, even though sometimes an expression is only needed for its [[side-effect(programming)\|]]s. For example, a read statement's value indicates whether and [[EOL]] (end-of-line) or an [[EOF]] (end-of-file) was encountered, although what's typically used is the expression's side effect of performing input. IMP compilers were developed for the [[CDC-6600]], [[PDP-10]] and [[PDP-11]] computers. Important IMP versions were '''IMP65''', '''IMP70''', and '''IMP72'''. IMP was used to implement the [[EMAS]] [[operating system]]. ==Extensible syntax in IMP72==

IMP (programming language): Difference between revisions