How the && Operator Works?

The && operator accepts a couple of boolean (conditional) statements, which have a true or false value, and returns one boolean statement as a result. Using it instead of a couple of nested if blocks, makes the code more readable, ordered and easy to maintain. But how does it work, when we put a few conditions one after another? As we saw above, the logical "AND" returns true, only when it accepts as arguments statements with value true. Respectively, when we have a sequence of arguments, the logical "AND" checks either until one of the arguments is over, or until it meets an argument with value false.


bool a = true;
bool b = true;
bool c = false;
bool d = true;
bool result = a && b && c && d;
// false (as d is not being checked)

The program will run in the folowing way: It starts the check form а, reads it and accepts that it has a true value, after which it checks b. After it has accepted that a and b return true, it checks the next arguement. It gets to c and sees that the variable has a false value. After the program accepts that the agrument c has a false value, it calculates the expression before c, independent of what the value of d is. That is why the evaluation of d is being skipped and the whole expression is calculated as false.

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