if test condition question

[Hunki]

if [ $a -lt 7 -a [ $b -eq 16 -o $b -eq 8 ] ]

I want the following condition :

$a less than 7 and also $b should be either equal to 16 or it should be equal to 8. The above that I have gives me the following error :

[13]: 13: unknown test operator

[James R. Ferguson · Accepted solution]

Hi Hunki:

The syntax is:

if [ $a -lt 7 -a \( $b -eq 16 -o $b -eq 8 \) ]

...note the escaped parentheses.

Regards!

...JRF...

[Ivan Ferreira]

Try this:

if [ $a -lt 7 ] && ( [ $b -eq 16 ] || [ $b -eq 8 ] ); then

[Hunki]

Thanks !