it's about an educational programming language which was designed for children learning through entertainment. The logo was created in 1967 at Bolt, Beranek and Newman, a Cambridge, Massachusetts research firm, by Wally Feurzeig, Cynthia Solomon, and Seymour Papert. Its intellectual roots are in artificial intelligence, mathematical logic, and developmental psychology.Logo's most-known feature is the turtle, an on-screen "cursor" that showed output from commands for movement and small retractable pen, together producing line graphics. There are 197 variations of the Logo Language and 130 existing implementations but broadly used and prevalent early implementation of Logo is the logo of Apple Inc. It was a primary influence on the Smalltalk programming language. For easily coding in Logo Language Stephane Norte & Fernando G. Lobo from UAlg informatics Laboratory at the University of Algarve, Portugal implemented an on-screen keyboard name Virtual Logo Keyboard. you can download the keyboard from http://w3.ualg.pt/~snorte/LogoKeyboard.htm

1. Joy Protim
142002014
Dept. of CSE
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4. • History
• Why the Turtle
• Implementations
• Features
• Language Concept
• Basic Commands
• Example
• Logo Keyboard
• Reference
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5. • Logo is an educational programming language
• Designed in 1967 by Feurzeig, Papert & Solomon.
• Turtle robot.
• At BBN Paul Wexelblat developed a turtle named
Irving.
• Widely known for its use of turtle graphics.
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6. • Turtle an On-Screen “CURSOR”
• Directed to move around and draw by typing
commands at computer
• Designed to be programmed by children
• Less expensive version created on computer
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7. • 130 existing implementations.
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8. • Graphics / Music
• Extensible
• Modularity
• Interactivity
• Flexibility
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9. • Basic commands
• Control Structures
• while condition
• until condition
• repeat number
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• Recursion
• Scoping
• Global variables
• Local variables

10. • FD 100 - moves the turtle forward 100 units
• BK 50 - moves the turtle back 50 units
• RT 45 - turns the turtle 45 degrees to the right
• LT 90 - turns the turtle 90 degrees to the left
• Home - Returns the turtle to its origin
• CS - Erases the screen
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11. • Turtle Moves forward
100 units and turns 90º 4
times.
FD 100 RT 90 FD 100 RT
90
FD 100 RT 90 FD 100 RT
90
REPEAT 4 [FD 100 RT 90]
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Keyboard Link: http://w3.ualg.pt/~snorte/LogoKeyboard.htm

14. • https://en.wikipedia.org/wiki/Logo_(programming_la
nguage)
• http://home.sbc.edu.hk/~cpu/EMI/F1/Notes/LOGO/Lo
go_introduction_.ppt
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