If ... and ... if ...?

I have a question, that seems to be easy to answer, but after a lot of tries I just cannot make it.

Here is the problem:

I have a lot of different values and want to check, if all of them are true at the same time. If not, something else should happen. Do i really have to write:

if value1 = x 

    if value 2= y

   else do something else

        if value3=z

           else do something else 

    (and so on ...)

or is there something to combine values like: if value1=x and value2=y and value3=z then ...

As you might have guessed, I am more of a writer than a programmer, but I have a lot of fun using visionaire to tell stories and appreciate the help in the forum a lot.

constantin