Texas Instruments TI-84 PLUS - Graphing Calculator User Manual

Chapter 15: CATALOG, Strings, Hyperbolic Functions 271
expr(string)
inString(
inString( returns the character position in string of the first character of substring. string can be a
string or a string variable.
start is an optional character position at which to start the search; the
default is 1.
inString(string,substring[,start])
Note: If string does not contain substring, or start is greater than the length of string, inString( returns 0.
length(
length( returns the number of characters in string. string can be a string or string variable.
Note: An instruction or function name, such as sin( or cos(, counts as one character.
length(string)
String4Equ(
String4Equ( converts string into an equation and stores the equation to Yn. string can be a string or
string variable.
String4Equ( is the inverse of Equ4String(.
String4Equ(string,Yn)

Texas Instruments TI-84 PLUS - Graphing Calculator Specifications

General

Type	Graphing Calculator
Display Type	LCD
Screen Resolution	96 x 64 pixels
Processor	Zilog Z80
Memory	24 KB RAM, 480 KB Flash ROM
Power Source	4 AAA batteries (with backup lithium battery)
Connectivity	I/O port
Weight	7.4 oz (210 g)
Software	TI-OS (Texas Instruments Operating System)