(dc.info.gz) Stack Control
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5 Stack Control
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'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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