Unfortunately, it is not possible to switch between ee_mode and non ee_mode. According to the source code, the output automatically falls into ee_mode when an e is used. But sometimes one wishes for the normal output.
Not sure if I understand you correctly, but if I type "9e5" into kcalc, then it shows 900000 (including a locale-dependend thousands separator). Could you please clarify steps to reproduce, expected and actual results?
It's been a while and I don't remember. But I remember that later I realized that it was possible to change the maximum number of digits. So I could represent numbers like 1e16 non-scientifically. By the way, the minimum possible number can only be given as 8. So 10,000 is always represented non-scientifically. But I think it would be helpful if you could switch between scientific and non-scientific representation. Also, the fixing of the exponent would be interesting. Often one would like to have numbers formatted according to a certain scheme (1.2E6 3.4E6 345E6 ...). Best regards, Heiko