Radio Shack TRS-80 Model 100 Basic Manual page 155

Line 38 Two characters are printed side by side: a space followed by a stick figure.
You may wish to confirm that CHR$(l47) is the stick figure by entering
PRINT CHR$(1£17)
The space is required to erase the stick figure which was printed on the last cycle of
the loop.
Line 48 A delay loop of a fraction of a second is used to control the speed at which
the figure "runs" across the display. You might experiment a little by changing the
upper limit in the FOR statement to a smaller value, say 30, and then execute the
program. Try the same thing with a larger value, say 200. The upper limit of 60 was
determined by trial and error to give a speed which "looked good."
Line 58 The NEXT I statement determines the end of the FOR / NEXT loop begun in
line 20. Note that this program uses nested FOR/NEXT loops.
Experiment #6 Generating Random Numbers
Computers can be used to simulate random events. This leads to many interesting and
useful applications. For example, you can use simulation to create such seemingly
diverse applications as interactive games and business decision-making models.
What makes simulation possible on a computer is the ability to generate random
numbers. The RND function can be used to return a number between 0 and 1 which
can be thought of as "random" in that the numbers appear to occur with equal
likelihood and unpredictability.
Clear memory using the NEW command and enter
PRINT RND(1)
to obtain the random number
.585218£1388£1623
If you again enter
PRINT RND(1)
you will get another random number
.10658628050158
If you continue to print RND( I), you will generate a stream of random numbers.
Enter the program:
10 PRINT RND(1) GoTo 10
and execute it.
If you watch the numbers scrolling by on the display, you will notice that they keep
changing and that they are all in the range from zero to one.
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