random(1)

NAME
random - generate random number

  Synopsis

random
random SEED
random START END
random START STEP END
random choice [ITEMS...]

  Description
RANDOM generates a pseudo-random integer from a uniform distribution. The range (inclusive) is dependent on the arguments passed. No arguments indicate a range of [0; 32767]. If one argument is specified, the internal engine will be seeded with the argument for future invocations of RANDOM and no output will be produced. Two arguments indicate a range of [START; END]. Three arguments indicate a range of [START; END] with a spacing of STEP between possible outputs. RANDOM choice will select one random item from the succeeding arguments.

Note that seeding the engine will NOT give the same result across different systems.

You should not consider RANDOM cryptographically secure, or even statistically accurate.

  Example
The following code will count down from a random even number between 10 and 20 to 1:

for i in (seq (random 10 2 20) -1 1)
    echo $i
end

And this will open a random picture from any of the subdirectories:

open (random choice **jpg)