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Solution Review: Compute an Expression Using Logic

Solution Review: Compute an Expression Using Logic

In this review, the solution of the challenge 'Compute an expression using logic' from the previous lesson is provided.

We'll cover the following...

Solution: Is it true or false?

Java
class HelloWorld {

    public static void main( String args[] ) {

        boolean x = true;

        boolean y = true;

        boolean answer;



        boolean not_x = !x;

        boolean xor_x = not_x ^ x;

        boolean and_xy = xor_x && y;

        answer = !and_xy;



        System.out.println(answer);

    }

}

Understanding the code

Line 7

  • The variable, not_x stores the result of the Boolean NOT of x.
  • The value of x
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