Editing Dc (computer program) (section)

===Registers===
In addition to these basic arithmetic and stack operations, dc includes support for [[Macro (computer science)|macros]], conditionals and storing of results for later retrieval.

The mechanism underlying macros and conditionals is the '''register''', which in dc is a storage location with a single character name which can be stored to and retrieved from: <code>sc</code> pops the top of the stack and stores it in register c, and <code>lc</code> pushes the value of register c onto the stack. For example:

<pre>
3 sc 4 lc * p
</pre>

Registers can also be treated as secondary stacks, so values can be pushed and popped between them and the main stack using the <code>S</code> and <code>L</code> commands.