Can someone explain this for me?

Shell Programming and Scripting
1

Can someone do me a favour and explain the following for me:

                                   ((r=$RANDOM%$n+1))

I know what $RANDOM does but what is % sign and what does it do with %$n+1?

2

Correct syntax:

$((r=$RANDOM%$n+1))

That generates a random number between 1 and the value of n. % is the modulo arithmetic operator - the remainder of division.

1 Like
3

Actually this is correct syntax in bash/ksh. It can also be written as:

((r=RANDOM%n+1))