Ternary operator in Bash

Question

Is there a way to do something like this using Bash?

int a = (b == 5) ? c : d;

Thanks.

Answer 1

ternary operator ? : is just short form of if/else

case "$b" in
 5) a=$c
 *) a=$d
esac

Or

 [[ $b = 5 ]] && a="$c" || a="$d"

Answer 2

[ $b == 5 ] && a=$c || a=$d

But watch out with this construct, as the part after the || is also executed when the part between && and || fails.

Answer 3

Code:

a=$([ "$b" == 5 ] && echo "$c" || echo "$d")

Answer 4

(( a = b==5 ? c : d )) # string + numeric

Answer 5

(ping -c1 localhost&>/dev/null) && { echo "true"; } || {  echo "false"; }