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turtlestate
(ts)
output 4 turtle properties:
pen down?
turtle visible?
background colour
pen colour
wrap
make the turtle remain inside the graphics window no
matter how large a movement command is given. Any
time the turtle moves off the window borders, it wraps
around the window and reappears on the opposite edge.
window
remove the boundaries from the turtle’s field of movement.
If the turtle moves beyond the borders of the graphics
window, it continues to move, but cannot be seen.
fence
prevent the turtle from moving beyond the edge of the
graphics window. If you try to move the turtle off the
window, it does not move and Logo displays a message.
2. Mathematics Commands
abs
n
output the absolute value of its input.
arctan
n
output the arctangent of its input.
cos
n
output the cosine of its input.
expn
n
calculate the natural base e (2.71828. . .) raised to the
power specified by its input.
int
n
output the integer portion of its input by removing the
decimal portion, if any. No rounding occurs.
log
n
output the natural logarithm of its input.
log10
n
output the base 10 logarithm of its input.
product
m n
output the product of its inputs. PRODUCT expects two
inputs, but will accept more if it and all its inputs are
enclosed in parentheses.
quotient
m n
output the result of dividing the first input by the second
input.
random
n
output a randomly selected number from 1 through its
input.
remainder
m n
output an integer which is the remainder of dividing the
first input by the second.
round
n
output the number rounded to the nearest integer.
sin
n
output the sine of its input.
sqrt
n
output the square root of its input.
sum
m n
output the result of adding its inputs. SUM expects two
inputs, but will accept more if it and its inputs are
enclosed in parentheses.
3. Word & List Commands
first
n
output the first element of its input.
last
n
output the last element of its input.
butfirst
(bf)
n
output all but the first element of its input
butlast
(bl)
n
output all but the last element of its input
word
m n
output a word made up of its inputs. WORD expects
two inputs, but will accept more if it and its inputs are
enclosed in parentheses.
34200Manual
2/28/00, 10:01 AM
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Содержание SilverStreak
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