Is it possible to use XOR to detect if exactly one of multiple conditions is true?

Question

E.g.,

if (bool1 ^ bool2 ^ bool3 ^ bool4)
{
    // Do whatever
}

It should execute only if exactly one of the conditions is met.

Answer 1

Add the bools together as integers and check if they equal 1.

In a language where casting from a boolean to an integer doesn't work, such as Java, the more long winded option is:

if ((bool1 ? 1 : 0) + (bool2 ? 1 : 0) + (bool3 ? 1 : 0) + (bool4 ? 1 : 0) == 1) {
    // only runs when one of bool 1-4 is true
}

However, in other languages where casting a boolean to an integer is valid, you can do the following:

if ((int)(bool1) + (int)(bool2) + (int)(bool3) + (int)(bool4) == 1) {
    // only runs when one of bool 1-4 is true
}