==== ADDROT ====
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Add elements to a list, keeping only the last N elements
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^ __Input Stack__ ^^^ ^ __Output Stack__ ^
| **Ldata** | **Oitem** | **Isize** | **→** | **Ldata-upd** |
| //Level 3// | //Level 2// | //Level 1// | //→// | //Level 1// |
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| **Keyword type** | [[manual:chapter5:basics#commands|Command]] ||
| **Parallel list processing capabilities** | [[manual:chapter5:listproc#group-2commands-that-must-use-dolist-to-parallel-process|Group 2]] | //Commands that must use //''[[manual:chapter6:lists:cmd_cmddolist|DOLIST]]''// to parallel process// |
| **Affected by flags** | //None// ||
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The ''ADDROT'' command adds element to a list just like the command ''[[manual:chapter6:lists:cmd_add|ADD]]'' does, but with a difference: if the list grows larger than **Isize** elements, the first one gets removed.
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''ADDROT'' is specific to **newRPL** and has no direct equivalent in **userRPL**.
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**__Input__**
4:
3: { A B C }
2: X
1: 3
…………………………………………………………………………………………………………
ADDROT
\\
**__Output__**
4:
3:
2:
1: { B C X }
…………………………………………………………………………………………………………
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