==== STKDEPTH ====
----
<callout type="primary" color="" icon="fa fa-book" title="Synopsis">
----
Push the depth of a given snapshot from the Undo stack on the current stack
</callout>

<callout color="green" icon="fa fa-indent" title="Stack Diagram">
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^  __Input Stack__  ^  ^  __Output Stack__  ^
|  **I<sub>snapshot</sub>**  |  **→**  |  **I<sub>depth</sub>**  |
|  //Level 1//  |  //→//  |  //Level 1//  |

{{page>manual:chapter6:aux:legend&nofooter&noeditbtn&inline}}

|**Type**| [[manual:chapter5:basics#commands|Command]]  ||
|**Parallel list processing**| [[manual:chapter5:listproc#group-1commands-that-cannot-parallel-process|Group 1]]  || 
|**Affected by flags**| None  ||
</callout>

<callout color="orangered" icon="fa fa-comment" title="Description">
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The ''STKDEPTH'' command retrieves the depth of a given snapshot on the Undo stack and pushes it on the current stack.

The command has little utility in interactive mode, since each time a command is typed and ''[[manual:chapter6:operators:cmd_ovr_xeq|XEQ]]''ted a snapshot of the stack is pushed on the Undo stack, altering the position of the intended snapshot.
</callout>

<callout type="danger" icon="true" title="Compatibility">
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This command is new in newRPL and does not exist in userRPL.
</callout>

<callout type="info" icon="true" title="Usage">
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The following program
<code>
« CLEAR
  123
  456
  789
  STKPUSH
  CLEAR
  "ABC"
  STKPUSH
  CLEAR
  2 STKDEPTH
»
</code>
will push the number ''3'' on the stack, since the snapshot on level 2 of the Undo stack has 3 elements in it.
</callout>

<callout color="darkgray" icon="fa fa-hand-o-right" title="Related Commands">
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{{page>manual:chapter6:stack&nofooter&noeditbtn&inline}}
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