scripting

how can we make the variables of one script available for the other script

generally the otehr script is mainly has execute commands
put ${TMPDIR}/${ZIPFILE} ${TARGETDIR}/${ZIPFILE} gets from other script

#!/usr/bin/expect

spawn sftp user@servername

expect "password:"
send "password\n"

expect "sftp>"
send "pwd\n"

expect "sftp>"
send "put ${TMPDIR}/${ZIPFILE} ${TARGETDIR}/${ZIPFILE}\n"

expect "sftp>"
send "bye\n"