Re: how to generate random negative numbers

[Soren Orel <soren.orel@gmail.com>]

user@debian:~$ $[ ($RANDOM % 30 ) -30 ]
bash: -26: command not found
user@debian:~$ $[ ($RANDOM % 30 ) -30 ]
bash: -3: command not found
user@debian:~$ $[ ($RANDOM % 30 ) -30 ]
bash: -23: command not found
user@debian:~$ $[ ($RANDOM % 30 ) -30 ]
bash: -2: command not found
user@debian:~$ $[ ($RANDOM % 30 ) -30 ]
bash: -29: command not found
user@debian:~$ $[ ($RANDOM % 30 ) -30 ]
bash: -19: command not found
user@debian:~$ $[ ($RANDOM % 30 ) -30 ]
bash: -13: command not found
user@debian:~$ $[ ($RANDOM % 30 ) -30 ]
bash: -30: command not found
user@debian:~$ $[ ($RANDOM % 30 ) -30 ]
bash: -21: command not found
user@debian:~$ $[ ($RANDOM % 30 ) -30 ]
bash: -14: command not found
user@debian:~$ $[ ($RANDOM % 30 ) -30 ]
bash: -1: command not found
user@debian:~$ $[ ($RANDOM % 30 ) -30 ]
bash: -7: command not found
user@debian:~$ $[ ($RANDOM % 30 ) -30 ]
bash: -26: command not found
user@debian:~$ $[ ($RANDOM % 30 ) -30 ]
bash: -26: command not found
user@debian:~$ $[ ($RANDOM % 30 ) -30 ]
bash: -25: command not found
user@debian:~$ $[ ($RANDOM % 30 ) -30 ]
bash: -5: command not found
user@debian:~$ $[ ($RANDOM % 30 ) -30 ]
bash: -5: command not found
user@debian:~$ $[ ($RANDOM % 30 ) -30 ]
bash: -29: command not found
user@debian:~$ $[ ($RANDOM % 30 ) -30 ]
bash: -3: command not found
user@debian:~$ $[ ($RANDOM % 30 ) -30 ]
bash: -16: command not found
user@debian:~$ $[ ($RANDOM % 30 ) -30 ]
bash: -29: command not found
user@debian:~$ $[ ($RANDOM % 30 ) -30 ]
bash: -18: command not found
user@debian:~$

it still doesn't work, and it gives only negative numbers when using e.g.: 30....-30

but thank you:)

I'm still searching:P

On Wed, Aug 12, 2009 at 1:52 PM, Alan Chandler <alan@chandlerfamily.org.uk> wrote:

Soren Orel wrote:

I know I could generate numbers like: 0; 1; 2
with:
$[ ( $RANDOM % 3 ) + 0 ]
But how could I generate numbers like: 0; 1; 2; -1; -2; etc? So negative+positive numbers too + zero
thank you

$[ ($RANDOM % 5 ) -2 ]

?

(I have no idea if I have the bash syntax right)

--
Alan Chandler
http://www.chandlerfamily.org.uk


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