==== i ====
<callout type="primary" color="" icon="fa fa-book" title="Synopsis">
----
Push the symbolic constant 'i' on the stack
</callout>

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

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| **Keyword type**  | [[manual:chapter5:basics#analytic-functions|Analytic Function]]  ||
| **Parallel list processing capabilities**  | [[manual:chapter5:listproc#group-1commands-that-cannot-parallel-process|Group 1]]  | //Commands that cannot parallel process//  |
| **Affected by flags**  | //None//  ||














</callout>

<callout color="orangered" icon="fa fa-comment" title="Description">
----
The ''i'' function pushes on the stack a symbolic representation of the imaginary unit $i=\sqrt{-1}$.

Application of the ''[[manual:chapter6:operators:cmd_ovr_num|→NUM]]'' operator returns the complex number ''(0,1)'' in rectangular format.
</callout>

<callout type="success" icon="true" title="Compatibility">
----
''i'' is fully equivalent to its **userRPL** counterpart.
</callout>

<callout type="info" icon="true" title="Usage">
----
**__Input__**
<code>
« 6 SETPREC
  i DUP
  →NUM
»
</code>
\\
**__Output__**
<code>
4:                                      
3:                                      
2:                                     i
1:                                 (0,1)
…………………………………………………………………………………………………………
                                        
</code>
</callout>

<callout color="darkgray" icon="fa fa-hand-o-right" title="Related Commands">
----
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</callout>