==== CLEAR ====
<callout type="primary" color="" icon="fa fa-book" title="Synopsis">
----
Delete all objects on the stack
</callout>

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

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

| **Keyword type**  | [[manual:chapter5:basics#commands|Command]]  ||
| **Parallel list processing capabilities**  | [[manual:chapter5:listproc#group-1commands-that-cannot-parallel-process|Group 1]]  | //Commands that cannot parallel process//  |
| **Affected by flags**  | [[manual:appendix:flags#flag-28|-28]]  | //Enable RPN stack mode//  |
| ::: | [[manual:appendix:flags#flag-29|-29]]  | //RPN stack depth//  |













</callout>

<callout color="orangered" icon="fa fa-comment" title="Description">
----
The ''CLEAR'' command deletes all the objects on the stack. The contents can be recovered pressing immediately after the **LF** key.

When in RPN mode ''CLEAR'' fills all the levels with the value stored in the top-most level of the stack.
</callout>

<callout type="warning" icon="true" title="Compatibility">
----
''CLEAR'' is not fully equivalent to its **userRPL** counterpart.

In particular:

  * **userRPL** has no RPN stack mode.
</callout>

<callout type="info" icon="true" title="Usage">
----
**__Input__**
<code>
4:                                   1_m
3:                       { 'X' 'Y' 'Z' }
2:                    "This is a string"
1:                                   123
…………………………………………………………………………………………………………
CLEAR                                   
</code>
\\
**__Output__**
<code>
4:                                      
3:                                      
2:                                      
1:                                      
…………………………………………………………………………………………………………
                                        
</code>
</callout>

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