How many ways are available to draw a line in autocad?

1- By entering command "LINE" or L enter

2- By selecting Line from Draw tool bar

3- By selecting line tool from tool palettes (you should have added to tool palettes)

4- Menu bar -> Draw -> Line

5 - You can search "LINE" in Application menu and start drawing it.

6- We can create custom commands.

1- Write ( L ) then click tab or enter

2- Go to menu bar and chose drawing click on line

3- You can find Line from main bar

There is two ways to draw line : by using command line or L or by using draw icon 

For its two types. 1st by selecting the line icon, 2nd by using the command line typing "L" or 'line" for line

For me I know only two methods

There are two methods to draw a line by using command or by simple clicking on line in draw toolbar,