Pi

Question

Pi

Closed this issue 4 years ago · 7 comments

Are there plans to implement a constant for pi?

Answer 1 · 2019-03-04T11:08:23.000Z

I didn’t have any real plans to as I originally didn’t want to have to keep adding new constants. That said I am not against adding it in now. Currently you could use [Pi] and supply it as a variable but I will aim to try and get it in the next release which will likely be out soon. Out of interest are there any other constants you would be interested in using?

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Answer 2 · 2019-03-04T13:20:08.000Z

Personally not that I can think of. I asked about pi because when I showed a demo the first thing tried was "pi * Pow(2,2)" and I thought it might be useful if the lib to have it predefined.

How many of these you want to support would be entirely up to you: https://en.wikipedia.org/wiki/Mathematical_constant

My only other feedback is if you might consider ^ as an expression for power, e.g. 2^2 in addition to Pow(2,2).

Answer 3 · 2019-03-06T07:59:50.000Z

Thanks, I will go through that list a bit more thoroughly and see what makes sense to include. I think for the time being it will probably involve a minimal set of constants but I will expose a mechanism for users to register their own constants making it fairly extensible.

On the point about the ^ symbol, unfortunately because this framework does more than just mathematical operations that symbol has another purpose. It currently operates as a Bitwise Exclusive Or (https://docs.microsoft.com/en-us/cpp/cpp/bitwise-exclusive-or-operator-hat?view=vs-2017)

Answer 4 · 2020-07-16T21:28:59.000Z

Slipped back out of this release but will hopefully be achievable in the next release

Answer 5 · 2020-12-29T23:51:15.000Z

The plan for constants at least for the short term will be to expose them as parameterless functions much like Excel does e.g.

PI() will return the Pi constant.

Answer 6 · 2021-01-05T20:42:18.000Z

Solved by PR #92 PI() and E() are now available as constant functions.

Answer 7 · 2021-01-11T22:17:58.000Z

Fixed and shipped in release v2.3.0