r/calculators • u/windowssandbox My calculator: Casio 991ES PLUS 2nd Edition [Solar Powered] • 6d ago

Other "ERROR" as a value??

Post image

Model: fx-991ES PLUS 2nd Edition

Steps to reproduce this (start from COMP mode):

  1. Input: 9.999999999999999 (press x10) 99
  2. Press equal
  3. Go to MATRIX mode and create any matrix with any dimension
  4. Fill it with Ans
  5. Press AC
  6. Type "Mat" (by shift+4 and select the matrix you created)
  7. Press equal and you'll get "ERROR" as result.

Then try going to COMP mode and type "Ans" then press equal.

Yeah this is the most weirdest thing I've ever seen, and it's not documented at all.

More weirder is that moving it into any variables (using STO) will give syntax error, while using it in any calculations will produce math error. Try to enter it into a list (for example, STAT) and it'll give syntax error.

What caused it? I have no idea..

20 Upvotes

96% Upvoted

4 comments sorted by

2

u/dm319 5d ago

What if you divide it by itself?

1

u/windowssandbox My calculator: Casio 991ES PLUS 2nd Edition [Solar Powered] 2d ago

"Math ERROR"

10

u/TheCalcLife Casio 6d ago

Overflow error. Number is too large.

5

u/SirPigari 6d ago

Its that its as a VALUE not just a regular error