How get last commnda history line number directly

From	almahdi <budikusasi@gmail.com>
Newsgroups	gnu.bash.bug
Subject	How get last commnda history line number directly
Date	2020-09-01 02:14 -0700
Message-ID	<mailman.1946.1598951688.2469.bug-bash@gnu.org> (permalink)
References	<1598951673480-0.post@n7.nabble.com>

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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 \!`

confusingly bash 'mainstream' itself wasn't found way to do




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How get last commnda history line number directly almahdi <budikusasi@gmail.com> - 2020-09-01 02:14 -0700

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