sample interaction with bash shell from the GNU project

$echo $BASH
/bin/bash
$echo $BASH_

$echo $BASH_v

$echo $BASH_VERSION
4.3.42(1)-release
$date || time
Sun Feb 21 23:15:50 IST 2016
$datei || time
bash: datei: command not found

real	0m0.000s
user	0m0.000s
sys	0m0.000s
$dateno || time
bash: dateno: command not found

real	0m0.000s
user	0m0.000s
sys	0m0.000s
$time  || date
bash: syntax error near unexpected token `||'
$time || date
bash: syntax error near unexpected token `||'
$time

real	0m0.000s
user	0m0.000s
sys	0m0.000s
$time || date
bash: syntax error near unexpected token `||'
$`time` || date

real	0m0.000s
user	0m0.000s
sys	0m0.000s
$time &&  date
bash: syntax error near unexpected token `&&'
$`time` &&  date

real	0m0.000s
user	0m0.000s
sys	0m0.000s
Sun Feb 21 23:25:24 IST 2016
$`timei` &&  date
bash: timei: command not found
$date  &&  time
Sun Feb 21 23:25:55 IST 2016

real	0m0.000s
user	0m0.000s
sys	0m0.000s
$

http://askubuntu.com/questions/372926/bash-syntax-error-near-unexpected-token