![]() The doublequote ( ") means the word is evaluated as itself, or its value after evaluation is the same as it was before.This is an extremely useful symbol that keeps reminding students that a variable is really a place in memory. The interpreter detects the datatype by context. The turtle can be set to erase anything below it, using the command PENERASE (PE), while the pen can be set to start drawing again with the command PENPAINT (PPT), in UCBLogo.įD 20 draw a line and move PENUP lift the pen so it draws nothing FD 20 move and not draw PENDOWN lower the pen so it draws again FD 20 draw a line and move PENUP lift the pen so it draws nothing FD 40 move and not draw PENDOWN lower the pen so it draws again RT 20 rotate right (clockwise) 20 degrees Data Using the turtle analogy, the turtle's pen must paint, and the turtle's pen must erase. The process is the same, except that in the former, a line is deposited on the display device and in the latter a line is removed. Animations require both the ability to draw and to erase shapes. Logo was designed in spirit of low threshold and no ceiling, which enables easy entry by novices and yet meet the needs of high-powered users. MSWLogo and its successor FMSLogo, for Microsoft Windows, are commonly used in schools in the United Kingdom and Australia. UCBLogo has a rudimentary graphical user interface (GUI), so several projects exist that provide a better interface. 4.4 Transcribe a sentence into Pig latin example.4.3 Define and use a procedure to compute plurals.4.2 Define and use a procedure which calculates the average of its numeric arguments.
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