answers in scientific notation (\AMCnumericChoices) (Feature #260)

same format as displayed by a pocket calculator when setting SCI and e.g. FIX 2 (normalized scientific form or standard form):
–0.13579 is displayed as –1.36E–1
So there would be two numbers to code: the significand (e.g. digits=3, decimals=2, sign=true) and the exponent (e.g. digitsexponent=1, signexponent=true), both with an optional sign and the letter "E" displayed between the two numbers.
All in all the above number would have 6 lines in vertical mode:
– 1
.
3
6
E
– 1

Detail: Zero should be coded as 0.00E0, but minus signs should also be allowed and also different exponents: –0.00E–5 should also be allowed if the result is 0.