Logo (programming language) facts for kids
- The article about graphical symbols is at Logo
Logo is a programming language that is easy to learn. It is used to teach students and children to program a computer. It was developed to process lists of words. It was like the language LISP.
In 1967, the first Logo ran on a mainframe computer, a machine called a teletype was used to type in and printout the results. There was no screen.
In 1969, it was used to control a Floor Turtle. Commands were added to send the turtle forwards and backwards, and to turn the turtle to left or right. This turtle had pen with different colors. When it moved, it left a trail on the floor.
When a new version of Logo was developed to draw graphics on a screen, it used the same commands. This was called Turtle graphics.
There are 170 versions of Logo. Many of them are open source and free. There are three Logo textbooks that can be downloaded free. Logo is usually an interpreted language.
Contents
Examples
Hello World
Load the Logo program. Type the next line in the command box.
print [Hello World!]
The computer replies.
Hello World!
Example Showing Graphics and Functional Programming
A spiral drawn using recursion. Using the editor, type in this new definition. to spiral :size if :size > 30 [stop] ; a condition stop fd :size rt 15 ; many lines of action spiral :size *1.02 ; the tailend recursive call end Type this in the command box. spiral 10
On the screen you will see. 
Logo Programs
Online books
Images for kids
-
Symmetry around a point can be obtained using only a few instructions, allowing users to draw hypotrochoids like the one shown here.
-
Animated gif with turtle in MSWLogo (Cardioid)
-
IBM LCSI Logo welcome screen
-
Source code and output in IBM LCSI Logo running in DOSBox
See also
In Spanish: Logo (lenguaje de programación) para niños
