check_file_directory_exists.sh

# inline
[ -d "my_dir" ] && echo "Yes" || echo "No"
[ -f "my_file" ] && echo "Yes" || echo "No"

# function
dir_exists() {
  ( test -d $1 > /dev/null 2>&1 ) && return 0 || return 1
}

file_exists() {
  ( test -d $1 > /dev/null 2>&1 ) && return 0 || return 1
}

if !(dir_exists "my_dir") then
  echo "Not"  
fi


if !(file_exists "my_file") then
  echo "Not"  
fi