Aliases: NULL as.null as.null.default is.null
Keywords: attribute manip list sysdata
### ** Examples is.null(list()) # FALSE (on purpose!)
[1] FALSE
is.null(pairlist()) # TRUE
[1] TRUE
is.null(integer(0)) # FALSE
[1] FALSE
is.null(logical(0)) # FALSE
[1] FALSE
as.null(list(a = 1, b = "c"))
NULL