/*A boolean expression is an expression that evaluates to either true
or false. The equality operator, ==, compares two values and returns
true or false depending on whether the values are equal.*/
console.log(5 == 5);
console.log(5 == 6);
//true
//false
/*We can also use == to see that true and "true" are not equal.*/
console.log(true == "true");
//false
(x == y && x != z) || (x != y && x == z)
(x == y || x == z) && (x != y || x != z)
(x == y) != (x == z)