shell script check if directory does not exist code example

Example 1: shell script to check the directory exists

Directory="/opt"
if [ -d "$Directory" ];
then
	echo -e "it's exits\n"
fi
### To check if it's not exists
if [ ! -d "$Directory" ];
then 
	echo -e "It's not there\n"
fi

Example 2: linux shell check if directory does not exists

if [ ! -d directory ]; then
  mkdir directory
fi