Texas Instruments TITANIUM TI-89 - Manual (Page 825)

Appendix A: Functions and Instructions 825
getDenom() MATH/Algebra/Extract menu
getDenom( expression1 )
⇒ ⇒ ⇒ ⇒ expression
Transforms expression1 into one having a reduced
common denominator, and then returns its
denominator.
getDenom((x+2)/(yì 3)) ¸ y ì 3
getDenom(2/7) ¸ 7
getDenom(1/x+(y^2+y)/y^2) ¸
xø y
getDtFmt() CATALOG
getDtFmt()
⇒ ⇒ ⇒ ⇒ integer
Returns an integer representing the date format
that is currently set on the device.
Integer values:
1 = MM/DD/YY
2 = DD/MM/YY
3 = MM.DD.YY
4 = DD.MM.YY
5 = YY.MM.DD
6 = MM-DD-YY
7 = DD-MM-YY
8 = YY-MM-DD
getDtStr()
CATALOG
getDtStr([ integer ]) ⇒ ⇒ ⇒ ⇒ string
Returns a string of the current date in the current
date format. For example, a returned string of
28/09/02 represents the 28th day of September,
2002 (when the date format is set to
DD/MM/YY ).
If you enter the optional integer that corresponds
to a date format, the string returns the current
date in the specified format.
Optional integer values:
1 = MM/DD/YY
2 = DD/MM/YY
3 = MM.DD.YY
4 = DD.MM.YY
5 = YY.MM.DD
6 = MM-DD-YY
7 = DD-MM-YY
8 = YY-MM-DD
getFold() CATALOG
getFold() ⇒ ⇒ ⇒ ⇒ nameString
Returns the name of the current folder as a string.
getFold() ¸ "main"
getFold()! oldfoldr ¸ "main"
oldfoldr ¸ "main"
getKey() CATALOG
getKey()
⇒ ⇒ ⇒ ⇒ integer
Returns the key code of the key pressed. Returns
0 if no key is pressed.
The prefix keys (shift ¤, second function 2,
option ¥, alpha j, and drag ‚) are not
recognized by themselves; however, they modify
the keycodes of the key that follows them. For
example: ¥ Ù
ƒ Ù ƒ 2 Ù.
For a listing of key codes, see Appendix B.
Program listing:
:Disp
:Loop
: getKey()!key
: while key=0
: getKey()!key
: EndWhile
: Disp key
: If key = ord("a")
: Stop
:EndLoop