turtle.left() method in Python

The turtle module provides turtle graphics primitives, in both object-oriented and procedure-oriented ways. Because it uses Tkinter for the underlying graphics, it needs a version of Python installed with Tk support.

turtle.left()

The turtle.left() method is used to change the direction of the turtle by the value of the argument that it takes. It gives the moving of the head of the turtle in a direction. 

turtle.left(angle)

The argument it takes is angle { a number (integer or float) }. So, it turns turtle left by angle units. (Units are by default degrees but can be set via the degrees() and radians() functions.) Angle orientation depends on the mode.

Below is the implementation of the above method with some examples :

Example 1:

Python3

# importing package
import turtle


# move the turtle forward by
# 100 unit distance in the
# direction of head of turtle
turtle.forward(100)

# change the direction of turtle
# by 90 degrees to the left.
turtle.left(90)

# move the turtle forward by
# 100 unit distance in the
# direction of head of turtle
turtle.forward(100)

Output:

Example 2:

Python3

# importing package
import turtle

# Loop for pattern
for i in range(10):

  # move the turtle forward by
  # 100+variable unit distance
  # in the direction of head of
  # turtle
  turtle.forward(100+10*i)

  # change the direction of turtle
  # by 90 degrees to the left.
  turtle.left(90)

Output :