2 ms·

Use ((...)) for arithmetic tests and [[...]] for other tests. [...] is for POSIX compatibility and not as useful as [[...]] though I don't remember the specific

Use ((...)) for arithmetic tests and [[...]] for other tests. [...] is for POSIX compatibility and not as useful as [[...]] though I don't remember the specifics.

jonhohle 10mo ago
[[…]] is a bash (probably other shells, too) built in. […] could be a built in, or could be a symlink to /bin/test.
- jcynix 10mo ago
  The [[…]] version was introduced in Peter Korn's korn shell, ksh88 IIRC.