Detect number entry on HP-35s?

[Dieter]

(02-25-2015 02:16 PM)Thomas Radtke Wrote:  If only reals are allowed, the user could enter i to indicate the end of the list.

This sounded like a good idea to me – until I tried it. The 35s does not allow comparing complex numbers (or complex with reals, for that matter). It will throw an INVALID DATA error. Sadly the 35s does not have a kind of TYPE command that returns the data type in X. This would allow both your suggestion as well as the solution I suggested in my previous post.

Dieter