Lessons For Logo Lovers - Lesson 1

Introduction

  • Logo is the programming language for Turtle Graphics.

  • A Logo Turtle is a special graphics character that obeys commands that you type.

  • The commands are very simple.

  • If you learn to use the commands well, you can do some amazing things with your Turtle!

The Basics

Your Turtle does not do anything unless you tell it to. It will not move without a C.A.R..
  • C  Command           What you want the Turtle to do
  • A  Argument           How much you want the Turtle to do it
  • R  Return (Enter Key)           DO IT!
For example, think of a simple command that we might give to another person.
We might say, "Walk." But we have not said enough. We must tell the person:
  • What direction to walk
  • How far to walk
  • After we tell the person those two things, then we can actually say, "Walk!"
The Turtle is the same way. We have to tell him everything.

Basic Commands that You MUST Know
FD Forward BK Backward
RT Right Turn LT Left Turn
CS Clear Screen SETPC Set Pen Color
HT Hide Turtle ST Show Turtle
PU Pen Up PD Pen Down

So...
Figure out how to TELL the computer how to draw a rectangle. Write the C.A.R.

Figure out how to TELL the computer how to draw a square. Write the C.A.R.

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