On Wed, Dec 06, 2017 at 03:35:51PM +0100, H.-Dirk Schmitt wrote: > I carefully read the man page and find no definition of the defined > range of integer variables in bash.
Bash uses signed 64-bit integers for arithmetic, since version 2.05b. Before that, it was either 32-bit or platform-defined; I'm not sure which. (Also, don't use declare -i. Please. It's atrocious.) wooledg:~$ echo $((2**63-1)) 9223372036854775807 wooledg:~$ echo $((2**63)) -9223372036854775808
