Texas Instruments TI-84 PLUS Guidebook - Page 278
inString, length, String
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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) Chapter 15: CATALOG, Strings, Hyperbolic Functions 271