Tertiary Operator
         by ilyas usal

This operator is also used to shorten if tests. It is used in the case that: if something is true, then 1 (or 0) thing happens, otherwise 1 (or 0) thing happens. Usually, we would write it like this:

if (i<5)
{
     i++;
}
else
{
     i--;
}

The first thing we can improve concerns the brackets: when there's only 1 instruction after a if or a else, you can forget about them:

if (i<5) i++;
else i--;

The next step is to use the tertiary operator: A?B:C, which means "if A is true, then B, else C". In our previous example, it would give:

(i<5)?i++:i-- ;

If you don't want anything to happen, replace B or C by null. If you want something more complex to happen, replace B or C by a function.