Opposite of is.integer(). Check if entry is not an integer
Examples
is.integer(78L) #TRUE
#> [1] TRUE
not.integer(78L) #FALSE
#> [1] FALSE
not.integer(23.43) # TRUE
#> [1] TRUE
not.integer(45L) # FALSE
#> [1] FALSE
if(not.integer(4L)) message("yes") # NULL