Page 65 - Computer Class 04

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Logo is pronounced as Low-go and is a high level programming language

known for its graphics capabilities, created by Seymour Papert in 1967.
Logo is often used for young school children as a basic method of

programming instructions into a computer to create a graphic.

Below, are the instructions used to create a square.

Forward 100
Forward 100
Right 90 Right 90 Right 90
Forward 100

Right 90
Forward Forward
Forward 100 100 100

Right 90 Right 90

Forward 100 Square in Logo

The most popular Logo environment has involved the Turtle, originally a

robotic creature that moved around on the floor.

It can be directed by typing commands at the computer. The command
forward 100 causes the turtle to move forward in a straight line 100 “turtle

steps”. Right 45 rotates the turtle 45 degrees clockwise while leaving it in

the same place on the floor. Then forward 50 causes it to go forward 50
steps in the new direction.

With just the two commands forward and right, the turtle can be moved in
any path across the floor. The turtle also has a pen which may be lowered

to the floor so that a trace is left of where it has travelled. With the pen

down, the turtle can draw geometrical shapes, pictures and designs of all
sorts.

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