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    Flowgorithm

    Draw Circle using Flowgorithm Turtle

    Overview

    In this tutorial, we will learn how to draw a circle using Flowgorithm Turtle. We will follow a simple algorithm to draw the circle. The turtle in a loop turns a small degree turn_angle and draws a small arc. The turtle should cover 360 degrees to draw the complete circle in the loop.

    Let’s assume the loop iterates n times.

    The turtle turns an angle: turn_angle

    We have to choose the iterations n and the turn angle such that

    360 = n * turn_angle

    To draw a complete circle the turtle should turn 360 degrees in the loop. We choose the small turn angle to make the circle look smooth. For example, in the example, the number of iterations = 360 and the turn_angle is 1 degree. If the turtle doesn’t cover the 360 degrees it would draw a circular arc.

    Pseudocode

    The pseudocode for the flowchart is as follows:

    // Draw Circle Flowgorithm Flowchart
    Declare Integer i

    For i = 1 To 360
    Turn Right 1
    Draw 10
    End For

    Flowchart

    The Flowgorithm flowchart to draw a circle is as follows:

    Declare a loop counter variable: i

    Initialize a For loop to make it run 360 times.

    In the For loop statement, the turtle turns a small degree and draws a small line. Add a Turn symbol and the Forward symbol. The turn degrees and the iterations should cover 360 degrees to draw the complete circle.

    Save the Flowchart.

    Run the flowchart.

    Draw Circle Flowgorithm Flowchart

    Let’s draw a circle with a specified radius

    Now that we know how to draw a circle, in the next version we will draw a circle of a specific radius. We will prompt the user to enter the radius of the circle. Let’s calculate the arc length that the turtle draws in the loop.

    Let’s assume the circle radius is: r

    Circumference of the circle = 2 * pi* r

    So the length of the arc that the turtle draws in the loop is: (2*pi*r)/360

     

    Draw Circle with Specific Radius

    —

    Flowgorithm Tutorials

    Flowgorithm flowchart tutorials on this website:

    https://www.testingdocs.com/flowgorithm-flowchart-tutorial/

    Flowgorithm Website

    For more information on the Flowgorithm tool, please visit the official website at:

    http://flowgorithm.org/

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