Texas Instruments TITANIUM TI-89 - Manual (Page 832)

832 Appendix A: Functions and Instructions
inString() MATH/String menu
inString( srcString , subString [, start ])
⇒ ⇒ ⇒ ⇒ integer
Returns the character position in string srcString at
which the first occurrence of string subString
begins.
start , if included, specifies the character position
within srcString where the search begins. Default
= 1 (the first character of srcString ).
If srcString does not contain subString or start is >
the length of srcString , returns zero.
inString("Hello there","the")
¸
7
"ABCEFG"! s1:If inString(s1,
"D")=0:Disp "D not found." ¸
D not found.
int() CATALOG
int( expression ) ⇒ ⇒ ⇒ ⇒ integer
int( list1 )
⇒ ⇒ ⇒ ⇒ list
int( matrix1 ) ⇒ ⇒ ⇒ ⇒ matrix
Returns the greatest integer that is less than or
equal to the argument. This function is identical
to
floor() .
The argument can be a real or a complex number.
For a list or matrix, returns the greatest integer of
each of the elements.
int(л 2.5) ¸ л 3.
int([-1.234,0,0.37]) ¸
[-2. 0 0.]
intDiv()
CATALOG
intDiv( number1 , number2 )
⇒ ⇒ ⇒ ⇒ integer
intDiv( list1 , list2 ) ⇒ ⇒ ⇒ ⇒ list
intDiv( matrix1 , matrix2 )
⇒ ⇒ ⇒ ⇒ matrix
Returns the signed integer part of argument 1
divided by argument 2.
For lists and matrices returns the signed integer
part of argument 1 divided by argument 2 for
each element pair.
intDiv(л 7,2) ¸ л 3
intDiv(4,5) ¸ 0
intDiv({12,л 14,л 16},{5,4,л 3}) ¸
{2 л 3 5}
integrate See
‰‰‰‰()
, page 907.
iPart()
MATH/Number menu
iPart( number )
⇒ ⇒ ⇒ ⇒ integer
iPart( list1 ) ⇒ ⇒ ⇒ ⇒ list
iPart( matrix1 )
⇒ ⇒ ⇒ ⇒ matrix
Returns the integer part of the argument.
For lists and matrices, returns the integer part of
each element.
The argument can be a real or a complex number.
iPart(л 1.234) ¸ л 1.
iPart({3/2,л 2.3,7.003}) ¸
{1 л 2. 7.}
isArchiv() CATALOG
isArchiv(var_name)
⇒ ⇒ ⇒ ⇒ true,false
Determines if var_name is archived or not.
Returns true if var_name is archived. Returns
false if var_name is not archived.
isArchiv(PROG1) ¸ True
isClkOn()
CATALOG
isClkOn() ⇒ ⇒ ⇒ ⇒ true,false
Determines if the clock is ON or OFF . Returns
true if the clock is ON . Returns false if the clock is
OFF .