[A recent SO question](https://stackoverflow.com/q/61348795/5306507) asks for *a convenient one-liner to generate a list of numbers and their negative counterparts in Python*. Given two integers $1≤a≤b$, generate all the integers $x$ such that $a≤|x|≤b$. The result may be printed or returned in any order or structure, as putting the result into a list and sorting it, yields `[-b,1-b,2-b,…,-a,a,a+1,a+2,…,b]` ### Examples $a=6,b=9$ gives `[6,-6,7,-7,8,-8,9,-9]` or `[6,7,8,9,-9,-8,-7,-6]` or `[-8,7,-9,-7,9,8,-6,6]` or `[[6,-6],[7,-7],[8,-8],[9,-9]]` or `[[6,7,8,9],[-6,-7,-8,-9]]` etc. $a=6,b=6$ gives `[6,-6]` or `[-6,6]` or `[[6,-6]]` or `[[6],[-6]]` etc.

# TeX, 75 bytes ```tex \def~{\count0 }\def\1#1#2{~#1\loop-\the~,\the~,\advance~1\ifnum~<#2\repeat} ``` Output will be printed into a PDF (if you're running `pdftex`). Example script: ```tex \def~{\count0 }\def\1#1#2{~#1\loop-\the~,\the~,\advance~1\ifnum~<#2\repeat} \1{6}{9} \bye ``` Output: ![numrange.png](/image?hash=2dcba78e6d46d9aa4cdd513996e94aa1c45e203863a59584c5f50cec06cf2cc1)

# [05AB1E], 4 bytes I'm just going to copy&paste my answer on [CG.SE](https://codegolf.stackexchange.com/questions/203797/generate-list-of-numbers-and-their-negative-counterparts). ŸD(« [Try it online!][TIO-k9chu51f] [05AB1E]: https://github.com/Adriandmen/05AB1E [TIO-k9chu51f]: https://tio.run/##yy9OTMpM/f//6A4XjUOr//8347IEAA "05AB1E – Try It Online" # Explanation ``` Takes two input integers Ÿ Inclusive range. D Duplicate the stack. ( Negate all items of the duplicated item. « Concatenate both lists. Implicit output ```

# [CJam], 9 bytes {),>_Wf*} [Try it online!][TIO-k9dojnro] Takes input as two numbers on the stack and places two lists on the stack. ## Explanation { } Input: 2 4 ) Increment: 2 5 , Range: 2 [0 1 2 3 4] > Slice: [2 3 4] _ Duplicate: [2 3 4] [2 3 4] Wf* Negate each: [2 3 4] [-2 -3 -4] [CJam]: https://sourceforge.net/p/cjam [TIO-k9dojnro]: https://tio.run/##S85KzP3/v1pTxy4@PE2r9r@Vt3VhXayRfnWdd6xVQrBWXq3@fzMFSy4zBTMA "CJam – Try It Online"

# PostgreSQL, 41 Bytes <>https://dbfiddle.uk/?rdbms=postgres_12&fiddle=983cfb3d1ba72c5e10e5cb9c315cb66c

# [PowerShell Core], 17 bytes ``` ps 6..9|%{@($_,-$_)} ``` [Try it online!][TIO-k9cjzdm8] [PowerShell Core]: https://github.com/PowerShell/PowerShell [TIO-k9cjzdm8]: https://tio.run/##K8gvTy0qzkjNydFNzi9K/f/fTE/Pska12kFDJV5HVyVes/b///8A "PowerShell Core – Try It Online"

Oracle, 63 bytes <>https://dbfiddle.uk/?rdbms=oracle_18&fiddle=ccc36f23065dcce4b3a7ed6143e01e27&hide=1