integer.md

1:3
#> [1] 1 2 3
1L
#> [1] 1
-2147483647L
#> [1] -2147483647
as.integer(c("23", "456"))
#> [1]  23 456

NA_integer_
#> [1] NA

^{Created on 2020-03-03 by the reprex package (v0.3.0)}