(dc.info.gz) Stack Control

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 5 Stack Control
 ***************
 
 `c'
      Clears the stack, rendering it empty.
 
 `d'
      Duplicates the value on the top of the stack, pushing another copy
      of it.  Thus, `4d*p' computes 4 squared and prints it.
 
 `r'
      Reverses the order of (swaps) the top two values on the stack.
      (This can also be accomplished with the sequence `SaSbLaLb'.)
      (This command is a GNU extension.)
 

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