Comment on I dunno

brown567@sh.itjust.works ⁨3⁩ ⁨weeks⁩ ago

• chonglibloodsport@lemmy.world ⁨3⁩ ⁨weeks⁩ ago

  Actually:

  2 <enter> 5 <enter> 8 <enter> 5 - x +

  10 keystrokes

  I use RPN on my phone calculator for fun but it can also be annoying sometimes.

  On my CASIO FX-260 Solar II calculator (super cheap, really nice and simple but also powerful) that would be:

  2 + 5 ( 8 - 5 ) =

  9 keystrokes

  source

  • excral@feddit.org ⁨3⁩ ⁨weeks⁩ ago

    You could do

    8 <enter> 5 - 5 × 2 +

    -> 8 keystrokes

    source
  • oatscoop@midwest.social ⁨3⁩ ⁨weeks⁩ ago

    8 5 - 5 * 2 + CR .

    source

    • chonglibloodsport@lemmy.world ⁨3⁩ ⁨weeks⁩ ago

      But that’s a specific optimization where you can no longer read the numbers left to right, the original intent of RPN.

      source
• Nindelofocho@lemmy.world ⁨3⁩ ⁨weeks⁩ ago

  Im terrible at math, what is this though?

  source

  • MimicJar@lemmy.world ⁨3⁩ ⁨weeks⁩ ago

    RPN or Reverse Polish Notation is a notation for calculators to be less ambiguous. The last numbers use the operator to their right, repeat.

    • 2 5 8 5 - × +
    • (8 - 5 = 3)
    • 2 5 3 × +
    • (5 × 3 = 15)
    • 15 2 +
    • (15 + 2 = 17)
    • 17

    source

    • Nindelofocho@lemmy.world ⁨3⁩ ⁨weeks⁩ ago

      This might actually help me thank you!

      source
  • BrambinagStoneboots@lemmy.world ⁨3⁩ ⁨weeks⁩ ago

    Reverse Polish Notation

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    • Nindelofocho@lemmy.world ⁨3⁩ ⁨weeks⁩ ago

      This might actually help me thank you!

      source

      • Revan343@lemmy.ca ⁨3⁩ ⁨weeks⁩ ago

        See also

        source