On 9/1/20 5:14 AM, almahdi wrote:
> How to get last commnda history line number purely & directly on bash script
> or prompt ?
> 
> as it's pure & directly viable in PS1 env. var.
> PS1=`echo \!`

HISTCMD
       The history number, or index in the history list, of the current
       command.  Assignments to HISTCMD are ignored.  If HISTCMD is un-
       set, it loses its special properties, even if it is subsequently
       reset.

-- 
``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU    c...@case.edu    http://tiswww.cwru.edu/~chet/

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