Texas Instruments TI-83 Manual Book page 297

sub(
Entering a
Function to
Graph during
Program
Execution
returns a string that is a subset of an existing string.
sub(
string can be a string or a string variable. begin is the
position number of the first character of the subset. length
is the number of characters in the subset.
string begin
sub( ,
In a program, you can enter a function to graph during
program execution using these commands.
Note: When you execute this program, enter a function to store to
ENTRY=
at the prompt.
CATALOG
length
, )
, Strings, Hyperbolic Functions 15-9
Y3