Calculator blog

We have recently reduced the price of most HP calculators, due to higher volume:

• HP Prime goes from 189,99€ to 144,99€, 21% VAT included.
• HP17bII+ goes from 94,95...

I have now several HP Prime machines. One for each of my sons (one of them using it at full power for engineering at University of Michigan), and several G1 models. I have just opened a G2 unit and updated it to the latest firmware version (20.12.2021)

I will spend some time with it, trying to learn how to program it in Python. I have take a look at the Finance app (remember that I created several finance programs, among them net present value and internal rate of return), and whil...

Games! The HP Prime is so fast (compared with other calculators) and the HP Basic so optimized that you can actually run games!

As always, you can go to hpcalc.org to see a lot of them. 

My preferred games:

• Asteroids: a version of the old arcade...

I have not used too much lately my Prime. I have been mostly focused on the HP41CL, but the other day I went to the site hpcalc.org , which has a site with software for graphical HP calculators, dating all the way to the 48 series, 39, 40 to the...

HP has just issued the HP Prime app for iPhone and iPad! It works fast. There are several minor bugs, but that's to expect, since the new appel guidelines imply that the code had to be converted to 64 bit from 32, and that all characters are stored with 32 bits (which allow much more complex character sets).

The app can be found in...

Two blog issues ago, we discussed the screen menu and how to make it work. We had to descend to pixel level programming. It is still far from low level, but it is considerably lower than anything done before. This is what “tab menus” entail.

There is a different (and simpler) way of choosing between different alternatives:...

The latest HP Prime firmware has introduced several important features, which were lacking in previous releases and that allow to better use the machine resources.

Here we will discuss the drop-down menus and the screen tab menus. This makes communicating with your program much more seamless, GUI-oriented, than the typical...

My elder son is beginning to enjoy maths! At 12 years old, he is fond of reading, and he has considered several possible future professions, all related with writing and reading: journalist, novel writer, actor, etc. But now that he has enjoyed a good teacher, that makes maths learning fun (basically by giving them homework that is...

We discussed a couple of days ago about the formula library designed by Eddie B. Shore. I have added several equations on my own - namely all the decibel-watt and decibel-voltage gain calculations, loudspeaker sensitivity; but do you have equations you want to have included?

Also, it is good practice to include the equat...