turtle.undo() function in Python

18 Sep turtle.undo() function in Python

Posted at 18:56h in Python Turtle by Studyopedia Editorial Staff 0 Comments

The turtle.undo() function in Python undoes (reverses) the last turtle action. This can be repeated to undo multiple steps, depending on the undo buffer size.

Syntax: turtle.undo()
Parameters: None.

Let us see an example to implement the turtle.undo() function in Python:

Demo11.py

# turtle.undo() function in Python
# Code by Studyopedia

import turtle

window = turtle.Screen()
t = turtle.Turtle()

t.forward(100)
t.left(90)
t.forward(50)
t.undo()        # Undo the last action (forward 50)
t.undo()        # Undo the previous action (left 90)

window.exitonclick()

The following is the output:

turtle.undo() function in Python

In the above code, we followed the below steps:

Import the module: import turtle loads Python’s turtle graphics library.
Create the screen: window = turtle.Screen() opens the drawing window.
Create the turtle: t = turtle.Turtle() creates the turtle (the pen) you control.
Draw first segment: t.forward(100) moves 100 units forward, drawing a line.
Turn left: t.left(90) rotates the turtle 90° counterclockwise without moving.
Draw second segment: t.forward(50) draws a 50-unit line in the new direction.
Undo last action: t.undo() reverses the most recent action, removing the 50-unit forward movement and restoring the prior position.
Undo previous action: t.undo() reverses the earlier left turn, restoring the previous heading.
Close on click: window.exitonclick() keeps the window open until you click inside it, then closes.