Get ceiling integer from number in linux (BASH)

Question

How would I do something like:

ceiling(N/500)

N representing a number.

But in a linux Bash script

Answer 1

Some more concise Awk logic

awk '
function ceil(ip) {
  print ip%1 ? int(ip)+1 : ip
}  
BEGIN {
  ceil(1000/500)
  ceil(1001/500)
}
'

Result

2
3