Transcription of R Language Definition
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R Language DefinitionVersion (2021-11-01)DRAFTR Core TeamThis manual is for R, version (2021-11-01).Copyrightc 2000 2021 R Core TeamPermission is granted to make and distribute verbatim copies of this manual providedthe copyright notice and this permission notice are preserved on all is granted to copy and distribute modified versions of this manual underthe conditions for verbatim copying, provided that the entire resulting derived workis distributed under the terms of a permission notice identical to this is granted to copy and distribute translations of this manual into an-other Language , under the above conditions for modified versions, except that thispermission notice may be stated in a translation approved by the R Core of Contents1 Basic types.. Vectors.. Lists.. Language objects.. Symbol objects.
The following table describes the possible values returned by typeof and what they are. "NULL" NULL "symbol" a variable name "pairlist" a pairlist object (mainly internal) "closure" a function "environment" an environment "promise" an object used to implement lazy evaluation "language" an R language construct
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