Appendix A: Functions and Instructions 841
@ SendCalc 
var[,port]
Sends contents of 
var
 from a TI-89 Titanium to another
TI-89 Titanium.
If the port is not specified, or 
port = 0
 is specified, the
TI-89 Titanium sends data using the USB port if
connected, if not, it will send using the I/O port.
If 
port = 1
, the TI-89 Titanium sends data using the
USB port only.
If 
port = 2
, the TI-89 Titanium sends data using the I/O
port only.
SendChat CATALOG
SendChat 
var
A general alternative to 
SendCalc
, this is useful if
the receiving unit is a TI
-
92 (or for a generic "chat"
program that allows either a TI
-
92, Voyage™ 200,
or TI
-
92 Plus to be used). Refer to 
SendCalc
 for
more information.
SendChat
 sends a variable only if that variable is
compatible with the TI
-
92, which is typically true in
"chat" programs. However, 
SendChat
 will not send
an archived variable, a TI
-
89 graph data base, etc.
Program segment:
 ©
:a+b! x
:SendChat x
 ©
seq() MATH/List menu
seq(
expression
, 
var
, 
low
, 
high
[, 
step
])   ⇒ 
list
Increments 
var
 from 
low
 through 
high
 by an
increment of 
step
, evaluates 
expression
, and returns
the results as a list. The original contents of 
var
 are
still there after 
seq()
 is completed.
var
 cannot be a system variable.
The default value for 
step = 
1.
seq(n^2,n,1,6)
 
¸
{1 4 9 16 25 36}
seq(1/n,n,1,10,2)
 
¸
{1 1/3 1/5 1/7 1/9}
sum(seq(1àn^2,n,1,10,1))
 
¸
196...
127...
or press 
¥¸
 to get: 
1.549
...