IF statement and multiple options 2

[phorbiuz]

Can someone help with the best way to do this please? I'm looking for the simplest approach with the least amount of lines.

What I have is 3 variables each with their own numeric content. In an ideal world I'd have an if statement along the lines of:

if [[ $variable1 = 1 ]] or if [[ $variable2 = 4 ]] or if [[ $variable3 = 7 ]]
then
take action
fi

Remembering I want to keep this as simple as possible for other people to be able to follow, any suggestions?

Thanks in advance.

 

[PHV]

[ $variable1 -eq 1 -o $variable2 -eq 4 -o $variable3 -eq 7 ] && take action

Hope This Helps, PH.
FAQ219-2884
FAQ181-2886

 

[columb]

phorbiuz
Beware of your choice of equality - this is a very common error - well, in our team anyway.

The equals sign is string equality. Often, very often you can get away with it but consider the following code fragment.

var=01
if [ $var = 1 ] #this will fail - 01 is not the same STRING as 1
then
  do_action
fi

if [ $var -eq 1 ] # this is probably what you want - numeric equality
then
  do_action
fi

On the internet no one knows you're a dog

Columb Healy

 

[SamBones]

Whenever you have a lot of "if" options, a case statement is usually best...

case $var in
    [147])  do_action
            ;;
esac    

# or

case $var in
    1|4|7)  do_action
            ;;
esac

When you have to add more to the "if"s, this usually is easier to understand and make changes to.

 

[PHV]

Sam, you test a single variable but the OP test 3 different var ...

Hope This Helps, PH.
FAQ219-2884
FAQ181-2886

 

[SamBones]

Oops! My bad! I read it as three possible values for one variable.

Nevermind!