HP 40gs hp 40gs_user's guide_English_E_HDPMSG40E07A.pdf - Page 20

hp40g+.book Page 8 Friday, December 9, 2005 1:03 AM HINT • Pressing displays the list of Program Constants. You can use these in programs that you develop. • Pressing displays a menu of physical constants from the fields of chemistry, physics, and quantum mechanics. You can use these constants in calculations. (pSee "Physical constants" on page 13-25 for more information.) • Pressing takes you to the beginning of the MATH menu. See "Math functions by category" on page 13-2 for details of the math functions. When using the MATH menu, or any menu on the HP 40gs, pressing an alpha key takes you straight to the first menu option beginning with that alpha character. With this method, you do not need to press first. Just press the key that corresponds to the command's beginning alpha character. Note that when the MATH menu is open, you can also access CAS commands. You do this by pressing . This enables you to use CAS commands on the HOME screen, without opening CAS. See Chapter 14 for details of CAS commands. Program commands Pressing CMDS displays the list of Program Commands. See "Programming commands" on page 21-13. Inactive keys If you press a key that does not operate in the current context, a warning symbol like this ! appears. There is no beep. Menus A menu offers you a choice of items. Menus are displayed in one or two columns. • The arrow in the display means more items below. • The arrow in the display means more items above. 1-8 Getting started