How to deal with multiple composed/related conditions?

Question

Which is the best approach to deal with multiple composed/related conditions. Let's say that exists this conditions:

Condition A
Condition B
Condition C
...
Condition G

Some of these conditions are related, for example, Condition A and Condition G and Condition Dcomposes a condition, Condition C and Condition F composes a condition, F with A another, etc.

If I do it with if/else if the code looks like crap. So, which's the best way to do that in an ordered and maintainable way?

Answer 1

You can create temporary or derived conditions.

Condition_X = condition_a && condition_b && condition_c
Condition_Y = condition_e && condition_f && condition_g

If Condition_X == FALSE && Condition_Y then...