==== A→∡r ====
<callout type="primary" color="" icon="fa fa-book" title="Synopsis">
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Convert an angle to radians
</callout>

<callout color="green" icon="fa fa-indent" title="Stack Diagram">
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^  __Input Stack__  ^  ^  __Output Stack__  ^
|  **Num**  |  **→**  |  **∡<sub>rad</sub>**  |
|  **Z**  |  **→**  |  **Z<sub>rad</sub>**  |
|  **∡**  |  **→**  |  **∡<sub>rad</sub>**  |
|  **V**  |  **→**  |  **V<sub>rad</sub>**  |
|  //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-5one-argument-one-result-commands|Group 5]]  | //One argument, one result commands//  |
| **Affected by flags**  | [[manual:appendix:flags#flags-17-18|-17]]  | //Default angle unit (bit 0)//  |
| ::: | [[manual:appendix:flags#flags-17-18|-18]]  | //Default angle unit (bit 1)//  |













</callout>

<callout color="orangered" icon="fa fa-comment" title="Description">
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The ''A→∡r'' command turns a scalar or a suitable component of a composite object into an angle measured in radians.

In particular, if the component is:

  * a **scalar**, then the number is interpreted as an angle //in the current angular mode// and converted to radians;
  * a **polar complex number**, then the angular component is converted to radians;
  * an **angle**, then the angle is converted to radians;
  * a **vector**, then any angle or polar complex number //but not scalars// is converted to radians as per above rules.
</callout>

<callout type="danger" icon="true" title="Compatibility">
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''A→∡r'' is specific to **newRPL** and has no direct equivalent in **userRPL**.
</callout>

<callout type="info" icon="true" title="Usage">
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**__Input__**
<code>
4:                                      
3:                                      
2:                                      
1:          [ #2h ∡20g (1,2) (3,∡5.5°) ]
…………………………………………………………………………………………………………
A→∡r                                    
</code>
\\
**__Output__**
<code>
4:                                      
3:                                      
2:                                      
1:[ ∡2r ∡0.31415.r (1,2) (3,∡0.09599.r)…
…………………………………………………………………………………………………………
                                        
</code>
</callout>

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