Commodore 128D - Generating Random Numbers-The RND Function

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The computer added 0.5 to 4.75 before it executed the INT function,
so that it rounded 5.25 down to 5 for the result. If you want to round ~]
off the result of a calculation, do this: ^—»
? lNT((100/6) + 0.S) u""ur
You can substitute any calculation for the division shown in the inner '—'
parentheses.
What it you want to round off numbers to the nearest 0.01 ? Instead of !—'
adding 0.5 to your number, add 0.005, then multiply by 100. Let's say
you want to round 2.876 to the nearest 0.01. Using this method, you r~j
start with: I—I
?(2.876 + 0.005)*100 )\f \\f\\W
Now use the INT function to get rid of everything after the decimal {—'
point (which moves two places to the right when you multiply by
100). You are left with: p~l
? INT«2.876 + 0.005)*100) III I ^
which gives you a value of 288. All that's left to do is divide by 100 to j ,
get the value of 2.88, which is the answer you want. Using this tech- '—'
nique, you can round off calculations like the following to the nearest
0.01: ,-,
? INT((2.876 +1.29 +16.1 - 9.534 + 0.005)* 100)/100
Generating Random Numbers—The RND Function
The RND functions tells the computer to generate a random number.
This can be useful in simulating games of chance, and in creating
interesting graphic or music programs. All random (RND) numbers
are nine digits, in decimal form, between the values 0.000000001
and 0.999999999. Type:
Multiplying the randomly generated number by six makes the range
of generated numbers increase to greater than 0 and less than 6. In
order to include 6 among the numbers generated, we add one to the
result of RND(0)*6. This makes the range 1 <X<7. If we use the INT
function to eliminate the decimal places, the command will generate
whole numbers from 1 to 6. This process can be used to simulate the
rolling of a die. Try this program:
10 R= INT(RND(1)*6 + 1)
20 ?R
30 GOTO 10
68 USING C128 MODE—Advanced BASIC Programming