bash is empty variable code example
Example 1: bash if variable is not empty
VAR=`echo Hello world`
if [[ -n "$VAR" ]] ; then echo "Variable is set" ; fiExample 2: bash check if variable is empty
if [ -z "$var" ] #return true if $var is unsetVAR=`echo Hello world`
if [[ -n "$VAR" ]] ; then echo "Variable is set" ; fiif [ -z "$var" ] #return true if $var is unset