Texas Instruments TI-83 Manual Book page 669

Function or Instruction/
Arguments
GridOff
GridOn
G-T
Horiz
y
Horizontal
identity( dimension
condition
:If
: commandA
commands
:
condition
:If
:Then
: commands
:End
commands
:
TI-83 Plus Tables and Reference Information
Result
Turns off grid format.
Turns on grid format.
Sets graph-table vertical split-screen
mode.
Sets horizontal split-screen mode.
Draws a horizontal line at
) Returns the identity matrix of
dimension
columns.
If condition
commandA
Executes
condition
End if
y
.
dimension
rows ×
= 0 (false), skips
.
commands
from Then to
= 1 (true).
Key or Keys/
Menu or Screen/Item
† y .
GridOff
† y .
GridOn
† z
G-T
† z
Horiz
y <
DRAW
3:Horizontal
y >
MATH
5:identity(
† 
CTL
1:If
† 
CTL
2:Then
666