Using commandline options in shell scripts

Sample code using getopt

while getopts :f:cuh OP
do
            case ${OP} in
                           f)         SERVERS=${OPTARG}
                                       ;;
                           c)        if [ "${SERVERS}" != "false" ]
                                      then
                                                check
                                       else
                                               usage
                                      fi
                                      ;;
                           u)       if [ "${SERVERS}" != "false" ]
                                     then
                                                cd ${BASE}
                                      fi
                                     ;;
                        *|h)      usage
                                     ;;
                     esac
done