Type "help" followed by a class name for a list of commands in that class.
(      "help"    )

Type "help" followed by command name for full documentation.
(     "help"    )

Command name abbreviations are allowed if unambiguous.
(  ,      )
(gdb)

     ,    -
,   help      .  -
     data (       -
):

(gdb) help data
Examining data.     ( )

List of commands:   ( )

call --    

delete display     .  

disable display        

disassemble --    

display --        

enable display        

inspect --  ,    "print"

output   "print",        

print --    

printf -- Printf "  printf"

ptype --    TYPE

set --        VAR

set variable         VAR

undisplay --       

whatis --     

   : x/FMT ADDRESS

Type "help" followed by command name for full documentation.
(     "help"    )
Command name abbreviations are allowed if unambiguous.
(  ,      )

(gdb)

      whatis,    
     :

(gdb) help whatis
Print data type of expression .     (    )

  

 gdb    .     -
  xxgdb  mxgdb (    Motif,      
    Motif).    gdb 
 ,     Source Listing (  ), 
Command (),       ,  

 27.                                          849