Logical Operators in Java - Quiz

The logical AND operator (&&) in Java is used to perform a logical AND operation between two boolean expressions. It returns true if both expressions are true and false otherwise.

The logical AND operator in Java is represented by &&. Here's an example program demonstrating the use of the logical AND operator:

public class LogicalAndExample {
    public static void main(String[] args) {
        // Example variables
        boolean condition1 = true;
        boolean condition2 = false;

        // Using logical AND operator
        boolean result = condition1 && condition2;

        // Displaying the result
        System.out.println("Result of logical AND: " + result);
        
        // Additional example
        int number = 5;
        // Checking if the number is between 1 and 10 using logical AND
        boolean isBetweenOneAndTen = (number > 1) && (number < 10);

        // Displaying the result
        System.out.println("Is the number between 1 and 10? " + isBetweenOneAndTen);
    }
}

In this example, the program checks two boolean conditions using the logical AND operator (&&). It also demonstrates using the logical AND operator to check if a number is between 1 and 10. The result is then displayed on the console.

The logical AND operator (&&) in Java returns true only if both operands are true. In this case, true && false is false because one of the operands (q) is false.

In Java, the logical AND operator && returns true if both operands are true, otherwise, it returns false. Here's an example program:

public class LogicalAndExample {
    public static void main(String[] args) {
        // Example boolean values
        boolean p = true;
        boolean q = false;

        // Using logical AND operator
        boolean result = p && q;

        // Displaying the result
        System.out.println("Result of logical AND: " + result);
    }
}

In this example, the program sets p to true and q to false, then applies the logical AND operator (&&). The result is false because both conditions are not met.

Feel free to run this Java program to see the result.

The logical NOT operator in Java is represented by !. It negates the boolean value of its operand. Here's an example:

public class LogicalNotExample {
    public static void main(String[] args) {
        // Example boolean expression
        boolean expressionResult = (5 > 3);

        // Using logical NOT operator
        boolean result = !expressionResult;

        // Displaying the result
        System.out.println("Result of logical NOT: " + result);
    }
}

In this example, the expression (5 > 3) evaluates to true, and then the logical NOT operator negates it, resulting in false. Feel free to run this Java program to see the output.

The logical OR operator (||) in Java returns true if at least one of the operands is true. In this case, true || true is true because both operands (x and y) are true.

If x is true and y is true, the logical OR operator (||) in Java returns true if at least one of the operands is true. Here's an example:

public class LogicalOrExample {
    public static void main(String[] args) {
        // Example boolean values
        boolean x = true;
        boolean y = true;

        // Using logical OR operator
        boolean result = x || y;

        // Displaying the result
        System.out.println("Result of logical OR: " + result);
    }
}

In this example, since both x and y are true, the result of the logical OR operation (x || y) is true. Feel free to run this Java program to see the output.

The logical NOT operator (!) in Java is used to negate a boolean expression. It returns true if the expression is false and false if the expression is true.

The logical NOT operator in Java is represented by the exclamation mark (!). It negates the boolean value of its operand. Here's an example:

public class LogicalNotExample {
    public static void main(String[] args) {
        // Example boolean value
        boolean x = true;

        // Using logical NOT operator
        boolean result = !x;

        // Displaying the result
        System.out.println("Result of logical NOT: " + result);
    }
}

In this example, if x is initially true, the logical NOT operation (!x) will result in false. If x is initially false, the NOT operation will result in true. Feel free to run this Java program to see the output.

The logical OR operator (||) in Java returns true if at least one of the operands is true. In this case, false || true is true because one of the operands (b) is true.

If a is false and b is true, the logical OR operation (a || b) will evaluate to true because only one of the operands needs to be true for the entire expression to be true. Here's an example program:

public class LogicalOrExample {
    public static void main(String[] args) {
        // Example boolean values
        boolean a = false;
        boolean b = true;

        // Using logical OR operator
        boolean result = a || b;

        // Displaying the result
        System.out.println("Result of logical OR: " + result);
    }
}

In this example, the logical OR operation will result in true. Feel free to run this Java program to see the output.

The logical AND operator (&&) is used to perform a logical AND operation between two boolean expressions. It returns true if both expressions are true and false otherwise.

If p is false and q is false, the expression !(p && q) using logical NOT (!) will evaluate to true. This is because the inner expression (p && q) evaluates to false, and negating false with ! results in true. Here's an example program:

public class LogicalNotExample {
    public static void main(String[] args) {
        // Example boolean values
        boolean p = false;
        boolean q = false;

        // Using logical NOT operator
        boolean result = !(p && q);

        // Displaying the result
        System.out.println("Result of logical NOT: " + result);
    }
}

In this example, the logical NOT operation will result in true. Feel free to run this Java program to see the output.

The logical AND operator (&&) in Java is used to perform a logical AND operation between two boolean expressions. It returns true if both expressions are true. In this case, (4 < 6) && (8 > 5) is true.

The value of the expression (4 < 6) && (8 > 5) using logical AND (&&) in Java is true. This is because both conditions are true:

1. 4 < 6 is true.
2. 8 > 5 is also true.

In a logical AND operation, the overall result is true only if both conditions are true. Therefore, the entire expression evaluates to true. Here's an example program:

public class LogicalAndExample {
    public static void main(String[] args) {
        // Example conditions
        boolean condition1 = 4 < 6;
        boolean condition2 = 8 > 5;

        // Using logical AND operator
        boolean result = condition1 && condition2;

        // Displaying the result
        System.out.println("Result of logical AND: " + result);
    }
}

When you run this Java program, it will output "Result of logical AND: true".

The logical OR operator (||) is used to perform a logical OR operation between two boolean expressions. It returns true if at least one operand is true. The logical NOT operator (!) negates a boolean expression. In this case, (7 >= 5) || !(3 < 2) is true.

The value of the expression (7 >= 5) || !(3 < 2) using logical OR (||) and logical NOT (!) in Java is true.

Here's a breakdown of the expression:

1. 7 >= 5 is true because 7 is greater than or equal to 5.
2. !(3 < 2) is the logical NOT of 3 < 2, which is !(false) and evaluates to true.
3. The logical OR (||) requires at least one condition to be true for the entire expression to be true.

Since both 7 >= 5 and !(3 < 2) are true, the result of the entire expression is true.

Here's an example program:

public class LogicalExample {
    public static void main(String[] args) {
        // Example conditions
        boolean condition1 = 7 >= 5;
        boolean condition2 = !(3 < 2);

        // Using logical OR and NOT operators
        boolean result = condition1 || condition2;

        // Displaying the result
        System.out.println("Result of logical OR and NOT: " + result);
    }
}

When you run this Java program, it will output "Result of logical OR and NOT: true".