[QUOTE=3.14159;268354]That's a nice step.. But I'd need it to also continuously redefine the variable for me.

What I'm trying to do is something similar to this:

[code]for(n=1,20, print(random(10)))
4
7
8
0
0
6
5
4
3
5
4
7
6
1
3
0
9
4
5
7[/code]

It printed random numbers from 0-9 (Why the hell not 1-10?? for random([b]10[/b]))

I'd like to do the above, but excluding those numbers less than or equal to 5. If it's impossible in PARI/GP, feel free to point me to where it is possible to do so. Though I'd be very disappointed if it were actually impossible to do.[/QUOTE]

if you allow an upper limit I'd try something like:
[code]for(n=1,20,until(a>5,a=random(10));print(a","))[/CODE]

[QUOTE]random({N=2^31}): random integer between 0 and N-1.[/QUOTE]

that's why

Thanks for the advice on the random function.

Okay, that's closer, but not quite yet it.

What I would like to do is this:

random(a)+b - (random(c)+d)

Print 20 results, however, all results that are < 0 get the message, "no number here" instead.

[QUOTE=3.14159;268373]Thanks for the advice on the random function.

Okay, that's closer, but not quite yet it.

What I would like to do is this:

random(a)+b - (random(c)+d)

Print 20 results, however, all results that are < 0 get the message, "no number here" instead.[/QUOTE]

so: [CODE]e=0;until(e>20,for(b=1,100,for(d=1,100,a=random();c=random();if((a+b)-(c+d)>0,print1((a+b)-(c+d)",");e=e+1;if(e>20,break(3))))))[/CODE]

except more cleaned up ?

Kind of like this:

[code](21:17) gp > for(n=1,20, print(random(40)+6 - (random(30)+11)))
15
-30
-27
9
7
0
21
2
-12
7
-3
19
-3
18
-34
0
5
-22
8
-22[/code]

But all negative numbers/zeros get replaced by "no number here"

[QUOTE=3.14159;268377]Kind of like this:

[code](21:17) gp > for(n=1,20, print(random(40)+6 - (random(30)+11)))
15
-30
-27
9
7
0
21
2
-12
7
-3
19
-3
18
-34
0
5
-22
8
-22[/code]

But all negative numbers/zeros get replaced by "no number here"[/QUOTE]

altering yours I got :

[CODE]for(n=1,20,a=random(40);b=random(30);print(if(a+6 - (b+11)>0,a+6 - (b+11),"no number here")))[/CODE]

Yes! I'll do some more testing

This looks exactly on target

Thanks a million! :smile:

[QUOTE=3.14159;268379]Yes! I'll do some more testing

This looks exactly on target

Thanks a million! :smile:[/QUOTE]

remember you can do a if within a print to choose what to print.

Okay, thanks for the tip.

Also, I didn't understand how

[code]for(n=1,20,a=random(40);b=random(30);print(if(a+6 - (b+11)>0,a+6 - (b+11),"no number here")))[/code]

worked.

It stores a and b, which are random numbers on [0, 39] and [0, 29] respectively. If a+6 - (b+11)>0, that is, a > b+5, it prints the difference a+6 - (b+11). Otherwise, it prints "no number here". This process is repeated a total of 20 times.

I would write this
[code]{for(n=1,20,
t=random(40)-random(30)-5;
print(if(t > 0, t, "no number here"))
)}[/code]

Anywho, in the spirit of somewhat old times..


Primality testing 17025*2^18800+1 [N-1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 7
Special modular reduction using all-complex FFT length 1536 on 17025*2^18800+1
Calling Brillhart-Lehmer-Selfridge with factored part 99.93%
17025*2^18800+1 is prime! (0.4559s+0.0015s)

[QUOTE=science_man_88;268380]remember you can do a if within a print to choose what to print.[/QUOTE]

.. Sm88
.. Primecare
.. See light
.. Shut up & drive
.. Lol