LINE Command:
AutoCAD
Command List
The LINE command allows you to create single straight lines.
To access the Line command you can:
click on the Line 
button on
the Draw toolbar,
OR
click on Draw, and select Line under the Draw
Menu,
OR
type l (for line) at the Command:
prompt.
--Prompt: LINE from point: Type
an Absolute Coordinate, an Object
Snap (Osnap), or click with the LEFT mouse button in the
drawing area to position the first end of the line.
--Prompt: To point: Give the location for the second end of the line.
--Prompt: To point: Either give a location for the end of the next
line, which will be attached to the last endpoint you added, or press Enter
to end the line and exit the Line command.
*NOTE: You can
continue to add lines to the last endpoint of the previous line until you
press the Enter key twice to exit the command.
Return to the AutoCAD Command List.