| case value in pattern1) | commands1;; | pattern2) | commands2;; | . . . | patternn) | commandsn;; |
esac Execute commands associated with the pattern that matches value. for variable in word1 word2. . . wordn do commands
done Execute commands once for each word, setting variable to successive words each time. for variable do commands
done Execute commands once for each positional parameter, setting variable to successive positional parameters each time. if command1 then commands
fi Execute commands if command1 returns a zero exit status. if command1 then commands2
else commands3
fi Execute commands2 if commands1 returns a zero exit status, otherwise execute commands3. if command1 then commands
elif command2 then commands
. . . elif commandn then commands
else commands
fi If command1 returns a zero exit status, or command2 returns a zero exit status, or commandn returns a zero exit status, then execute the commands corresponding to the if/elif that returned a zero exit status. Otherwise, if all the if/elif commands return a non-zero exit status, execute the commands between else and fi. select variable in word1 word2. . . wordn do commands
done Display a menu of numbered choices word1 through wordn followed by a prompt (#? or $PS3). Execute commands for each menu selection, setting variable to each selection and REPLY to the response until a break, exit, or EOF is encountered. select variable do commands
done Display a menu of numbered choices for each positional parameter followed by a prompt (#? or $PS3). Execute commands for each menu selection, setting variable to each selection and REPLY to the response until a break, exit, or EOF is encountered. until command1 do commands
done Execute commands until command1 returns a zero exit status while command1 do commands
done Execute commands while command1 returns a zero exit status. | 
