Texas Instruments TI-83 - page 295

CATALOG, Strings, Hyperbolic Functions 15-7
8315CATS.DOC TI-83 international English Bob Fedorisko Revised: 02/19/01 12:54 PM Printed: 02/19/01 1:39
PM Page 7 of 10
Equ4String( converts to a string an equation that is stored
to any VARS Y.VARS variable. Yn contains the equation.
Strn (from Str1 to Str9, or Str0) is the string variable to
which you want the equation to be stored as a string.
Equ4String(Yn,Strn)
expr( converts the character string contained in string to
an expression and executes it. string can be a string or a
string variable.
expr(string)
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.
Equ4String(
expr(
inString(