I find it often after a number. What does it mean and what is that? It’d be nice if you could help me.
(from Google search)
Some books that are more than 100 years old still won't sell for more than a dollar, if that.
(Harry Potter 2 [US Version]: p.123)
Nearly Headless Nick, the ghost of Gryffindor Tower, was staring morosely out of a window, muttering under his breath, “… don’t fulfill their requirements … half an inch, if that …”