Question

Write the command to move turtle 20 steps backward

Answer 1

Turtle Commands

Active

Set a turtle as active. Only active turtles will

process commands. (If no turtle is specified,

all turtles will be set as active.)

Backward Bk

Move the turtle backwards by the specified

number of millimetres for example:

backward 10

Clean

Remove all turtle trails from the active view. This

does not remove dropped trails.

Clear

Clear the command line window.

ClearScreen Cs

Remove all turtle trails from the active view, then

returns the turtle to its home position.

Drop

Create a separate object from the current turtle

trail, and detach it from the turtle (so commands

like “clean” will have no effect on the dropped

trail).

East

Move a turtle right (north is assumed to be

vertical) a specified number of millimetres.

(If no turtle is specified, move all turtles right the

specified number of millimetres.) This does not

change the turtle’s orientation. For example:

east 20

Else

Start of a block of commands to process in the

event a proceeding “if” condition fails;

for example:

if i > 1

forward 10

else

right 90

end

End

End a conditional block, e.g., while, if, if else; for

example:

while i > 0

forward 20

Answer 2

Dear friend,

To move the turtle 20 steps backward, we have to type in:

backward 20

If your pen is positioned down, then it will draw a line while going backwards, else it will not draw anything.

Hope it helps !!!