R Under development (unstable) (2023-11-08 r85496 ucrt) -- "Unsuffered Consequences"
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> ##
> ##  c e i l . R  tests
> ##
> 
> ceil <- pracma::ceil
> Fix <- pracma::Fix
> 
> identical(ceil(0), 0)
[1] TRUE
> identical(ceil(-1), -1)
[1] TRUE
> identical(ceil(-1.5), -1)
[1] TRUE
> identical(ceil(1), 1)
[1] TRUE
> identical(ceil(1.5), 2)
[1] TRUE
> 
> identical(Fix(0), 0)
[1] TRUE
> identical(Fix(-1), -1)
[1] TRUE
> identical(Fix(-1.5), -1)
[1] TRUE
> identical(Fix(1), 1)
[1] TRUE
> identical(Fix(1.5), 1)
[1] TRUE
> 
> proc.time()
   user  system elapsed 
   0.10    0.03    0.14