GNU Info

(dc.info)Printing Commands

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Printing Commands
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`p'
     Prints the value on the top of the stack, without altering the
     stack.  A newline is printed after the value.

`n'
     Prints the value on the top of the stack, popping it off, and does
     not print a newline after.  (This command is a GNU extension.)

`P'
     Pops off the value on top of the stack.  If it it a string, it is
     simply printed without a trailing newline.  Otherwise it is a
     number, and the integer portion of its absolute value is printed
     out as a "base (UCHAR_MAX+1)" byte stream.  Assuming that
     (UCHAR_MAX+1) is 256 (as it is on most machines with 8-bit bytes),
     the sequence `KSK 0k1/ [_1*]sx d0>x [256~aPd0<x]dsxx sxLKk' could
     also accomplish this function, except for the side-effect of
     clobbering the x register.  (Details of the behavior with a number
     are a GNU extension.)

`f'
     Prints the entire contents of the stack without altering anything.
     This is a good command to use if you are lost or want to figure
     out what the effect of some command has been.