5 ms·

For fun, try to run this: `2 + 2 * 10%` in all calculators you have access to: on you phone, on your desktop, in kalk. As they say, "the answer will surprise y

For fun, try to run this: `2 + 2 * 10%` in all calculators you have access to: on you phone, on your desktop, in kalk. As they say, "the answer will surprise you" :)

npongratz 5y ago
Performing the calculation with Soulver did not surprise me (being what I calculated in my head ahead of time): 2 + 2 × 10% = 2.2 At the risk of admitting my ignorance, yet more interested in learning something new: should this answer (2.2) surprise me?
- dmitriid 5y ago
  Wolfram Alpha and iOS also give 2.2 On MacOS the answer is 2.4 In kalk it's 2.002 On Windows it's 0.4 in simple calc, and 2 in programmer calc (and there's no % in engineering calc)
  - paddim8 5y ago
    Haha damn, didn't expect that
  - sp1rit 5y ago
    What about the win32 calculator shipped with w7 and w10 ltsc?
  - TchoBeer 5y ago
    Android gives me 2.2
  - app4soft 5y ago
    2.2 via Google[0] > and there's no % in engineering calc Use 0.1 instead of 10%, it has the same vibe ;) [0] https://www.google.com/search?gbv=1&q=2%2B2%C3%9710%25&oq=&aqs= https://www.google.com/search?gbv=1&q=2%2B2%C3%9710%25&oq=&a...
a1369209993 5y ago
$ units You have: 2 + 2 * 10% Definition: 2.2 ITYM "the answer may surprise you", and in this case it did not.
- dmitriid 5y ago
  I did say "in all calculators you have access too, including kalk" ;) https://news.ycombinator.com/item?id=27336530 https://news.ycombinator.com/item?id=27336530
kzrdude 5y ago
Is there an explanation for the answer in kalk? Seems buggy It seems like an expression like "1 * 10%" in kalk is computed as if it means "1% * 10%" => "0.01 * 0.1" => "0.001"
j1elo 5y ago
The calculator that comes with MIUI 12 (Xiaomi phone) writes everything as you type, like you'd expect. But, the moment you type `%`, it instead replaces `10` with `0.1`. So in the end the screen shows: 2+2x0.1 = 2.2 I guess not as surprising as you expected :-]
- dmitriid 5y ago
  I did say "in all calculators you have access too, including kalk" ;) https://news.ycombinator.com/item?id=27336530 https://news.ycombinator.com/item?id=27336530
anthk 5y ago
Forth, once using fixed point and scaling 2e+2: 2 dup 100 10 */ swap 100 * + .S 220 OK

For fun, try to run this: `2 + 2 * 10%` in all calculators you have access to: on you phone, on your desktop, in kalk. As they say, "the answer will surprise you" :)

npongratz 5y ago

Performing the calculation with Soulver did not surprise me (being what I calculated in my head ahead of time): 2 + 2 × 10% = 2.2 At the risk of admitting my ignorance, yet more interested in learning something new: should this answer (2.2) surprise me?

dmitriid 5y ago
Wolfram Alpha and iOS also give 2.2 On MacOS the answer is 2.4 In kalk it's 2.002 On Windows it's 0.4 in simple calc, and 2 in programmer calc (and there's no % in engineering calc)
- paddim8 5y ago
  Haha damn, didn't expect that
- sp1rit 5y ago
  What about the win32 calculator shipped with w7 and w10 ltsc?
- TchoBeer 5y ago
  Android gives me 2.2
- app4soft 5y ago
  2.2 via Google[0] > and there's no % in engineering calc Use 0.1 instead of 10%, it has the same vibe ;) [0] https://www.google.com/search?gbv=1&q=2%2B2%C3%9710%25&oq=&aqs= https://www.google.com/search?gbv=1&q=2%2B2%C3%9710%25&oq=&a...

a1369209993 5y ago

$ units You have: 2 + 2 * 10% Definition: 2.2 ITYM "the answer may surprise you", and in this case it did not.

dmitriid 5y ago
I did say "in all calculators you have access too, including kalk" ;) https://news.ycombinator.com/item?id=27336530 https://news.ycombinator.com/item?id=27336530

kzrdude 5y ago

Is there an explanation for the answer in kalk? Seems buggy It seems like an expression like "1 * 10%" in kalk is computed as if it means "1% * 10%" => "0.01 * 0.1" => "0.001"

j1elo 5y ago

The calculator that comes with MIUI 12 (Xiaomi phone) writes everything as you type, like you'd expect. But, the moment you type `%`, it instead replaces `10` with `0.1`. So in the end the screen shows: 2+2x0.1 = 2.2 I guess not as surprising as you expected :-]

dmitriid 5y ago
I did say "in all calculators you have access too, including kalk" ;) https://news.ycombinator.com/item?id=27336530 https://news.ycombinator.com/item?id=27336530

anthk 5y ago

Forth, once using fixed point and scaling 2e+2: 2 dup 100 10 */ swap 100 * + .S 220 OK