How to generate random even number as parameter of function in bash one line command?

Question

I need to set random even number as function parameter in terminal:
soapy_power -b random_even_number

First step, I generate random number with shuf -i1-10 -n1
Next,I try to judge whether random number is even,if not +1 to this number.

What I tried and failed: $(((shuf -i1-10 -n1) %2 -eq 0 OR (shuf -i1-10 -n1)+1))

`$(( $(shuf -i1-5 -n1) * 2))`; though a solution referencing `$RANDOM` (eg, pjh's answer) eliminates the overhead of invoking a sub-process call — markp-fuso, Mar 18 '22 at 19:34
Does this answer your question? [How to generate random number in Bash?](https://stackoverflow.com/questions/1194882/how-to-generate-random-number-in-bash) — Romeo Ninov, Mar 19 '22 at 12:44

pjh · Accepted Answer · 2022-03-19T02:39:39.040

1

Try

soapy_power -b "$(( RANDOM%5*2+2 ))"

edited Mar 19 '22 at 02:39

answered Mar 18 '22 at 19:26

pjh

1 Answers1