Texas Instruments TI-84 Plus - Expr(; Instring(

Chapter 15: CATALOG, Strings, Hyperbolic Functions 419
expr(
expr(expr(
expr(
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(
inString(inString(
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.