AUTOCAD

You can use the POLYLINE  command to draw polylines in AutoCAD. 

The POLYLINE command is available in the DRAW PANEL in the HOME TAB of the menu system in AutoCAD.

You can even type in the word "PLINE" using the keyboard and it will appear in the command line and you can activate polyline from there as well.

Before you start drawing just make sure you have the DYNAMIC INPUT setting switched ON.

Watch the video below to understand how do we draw POLYLINES in AutoCAD,