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 Commands for controlled output
 ==============================
 
    During the execution of a command file or a user-defined command,
 normal GDB output is suppressed; the only output that appears is what is
 explicitly printed by the commands in the definition.  This section
 describes three commands useful for generating exactly the output you
 want.
 
 `echo TEXT'
      Print TEXT.  Nonprinting characters can be included in TEXT using
      C escape sequences, such as `\n' to print a newline.  *No newline
      is printed unless you specify one.* In addition to the standard C
      escape sequences, a backslash followed by a space stands for a
      space.  This is useful for displaying a string with spaces at the
      beginning or the end, since leading and trailing spaces are
      otherwise trimmed from all arguments.  To print ` and foo = ', use
      the command `echo \ and foo = \ '.
 
      A backslash at the end of TEXT can be used, as in C, to continue
      the command onto subsequent lines.  For example,
 
           echo This is some text\n\
           which is continued\n\
           onto several lines.\n
 
      produces the same output as
 
           echo This is some text\n
           echo which is continued\n
           echo onto several lines.\n
 
 `output EXPRESSION'
      Print the value of EXPRESSION and nothing but that value: no
      newlines, no `$NN = '.  The value is not entered in the value
      history either.   Expressions Expressions, for more
      information on expressions.
 
 `output/FMT EXPRESSION'
      Print the value of EXPRESSION in format FMT.  You can use the same
      formats as for `print'.   Output formats Output Formats, for
      more information.
 
 `printf STRING, EXPRESSIONS...'
      Print the values of the EXPRESSIONS under the control of STRING.
      The EXPRESSIONS are separated by commas and may be either numbers
      or pointers.  Their values are printed as specified by STRING,
      exactly as if your program were to execute the C subroutine
 
           printf (STRING, EXPRESSIONS...);
 
      For example, you can print two values in hex like this:
 
           printf "foo, bar-foo = 0x%x, 0x%x\n", foo, bar-foo
 
      The only backslash-escape sequences that you can use in the format
      string are the simple ones that consist of backslash followed by a
      letter.
 

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