Vtech Power Zone Plus Desktop User Manual - Page 33

Conversion Pad This activity helps you with basic metric and imperial unit conversion. The screen will display categories such as speed, time, and weight, etc. Select a category, a starting unit of measurement, input a value, and then choose a new unit of measurement, click the Confirm icon to converse. Calculator This is an eight-digit fully functional calculator for addition, subtraction, multiplication and division. Move the cursor to click calculator buttons or use the keys from the keyboard to perform a calculation. Please press the AC button to clear the calculator before carrying out each calculation. Logo Logo is a standard computer programming language for beginners. Power Zone™ Plus Desktop can understand basic Logo programming commands. There are many books available that teach Logo programming. Visit your local library or bookstore for additional information on finding books about Logo programming. Logo is a programming language that can be used to teach your PC to do some new things. One thing Logo can teach your PC is how to draw pictures. This system of drawing is called Turtle Graphics. To view the built-in samples divided into Logo Beginner, Logo Intermediate & Logo Advanced, click Example icon. Commands Instructions to the Turtle are called commands. Each command begins with a key word telling the Turtle what to do. For example, "forward" is a command that tells the Turtle to move forward; "right" is a command that tells the Turtle to turn to the right. Often, commands will require additional information. For example, how far forward the Turtle should go. For example, "forward 10" tells the Turtle to move forward 10 Turtle steps; "right 90" is a command that tells the Turtle to turn 90 degrees (a quarter turn) to the right. If additional information is required for a command, it must appear immediately after the command, separated from the command by a space. In the home position, the Turtle, represented by a triangle, sits at the center of the screen pointing straight up. This location is indicated with the pair of numbers (0,0). The first number of this pair indicates how far left or right the Turtle is from the center of the screen; it is also called the x-coordinate. The second number indicates how far up or down the Turtle is from the center of the screen; it is also called the y-coordinate. For example, the pair (10, -5) indicates that the Turtle is 10 steps to the right and 5 steps below the center of the screen. 25