HP 40gs HP 39gs_40gs_Mastering The Graphing Calculator_English_E_F2224-90010.p - Page 25

The screens right show the same two numbers displayed as in turn as; Fixed 4, Scientific 4 and Engineering 4. Calculator Tip If you have Labels turned on when you in (or out) on a graph or choose a Trig scale then you may end up with axes whose numeric labels are horrible decimals (see below right). The setting of Fraction can be quite deceptive to use and is discussed in more detail on page 33. The next alternative in the MODES view of Decimal Mark controls the character which is used as a decimal point. In some countries a comma is used instead of a decimal point. If you opt to use a comma rather than a full stop then any places where a comma would normally be used (such as in lists) will swap to using a full stop. Any functions which might normally have terms separated by a comma will use a full stop instead. For example, ROUND(3.456,2) will become ROUND(3,456.2). Moving back to our tour of the keyboard, the next key is the ENTER key. This is used as an all purpose "I've finished - do your thing!" signal to the calculator. In situations where you would normally press the '=' key on most calculators, press the ENTER key instead. Above the ENTER key is the ANS key. This can be used to retrieve the final value of the last calculation done. An example is shown right. 25