How an 'if (A && B)' statement is evaluated?

Question

if( (A) && (B) )
{
  //do something
}
else
  //do something else

The question is, would the statement immediately break to else if A was FA

Answer 1

In C and C++, the && and || operators "short-circuit". That means that they only evaluate a parameter if required. If the first parameter to && is false, or the first to || is true, the rest will not be evaluated.

The code you posted is safe, though I question why you'd include an empty else block.