Assignment Operators - Quiz

The assignment operator (=) in Java is used to assign a value to a variable. It takes the value on the right-hand side and assigns it to the variable on the left-hand side.

The assignment operator in Java is =. Here's an example:

public class AssignmentExample {
    public static void main(String[] args) {
        // Assigning value to a variable
        int number = 42;

        // Displaying the value
        System.out.println("The value of number is: " + number);
    }
}

In this example, the value 42 is assigned to the variable number using the assignment operator (=). When you run this Java program, it will output "The value of number is: 42".

In Java, the expression y += z is a compound assignment operator, which adds the value of z to the current value of y and assigns the result back to y. It is equivalent to the expression y = y + z.

If y is initially 7 and z is 3, the result of the expression y += z would be:

y = y + z;

After the operation, the value of y will be 10 (7 + 3).

Here's an example in Java:

public class CompoundAssignmentExample {
    public static void main(String[] args) {
        // Declare variables
        int y = 7;
        int z = 3;

        // Compound assignment
        y += z;

        // Display the result
        System.out.println("The value of y after y += z is: " + y);
    }
}

When you run this Java program, it will output "The value of y after y += z is: 10".

In Java, the expression p /= 2 is a compound assignment operator, which divides the value of p by 2 and assigns the result back to p. It is equivalent to the expression p = p / 2.

If p is initially some numeric value, the result of the expression p /= 2 would be:

p = p / 2;

Here's an example in Java:

public class CompoundAssignmentExample {
    public static void main(String[] args) {
        // Declare variable
        double p = 10.0;

        // Compound assignment
        p /= 2;

        // Display the result
        System.out.println("The value of p after p /= 2 is: " + p);
    }
}

In this example, if p is initially 10.0, after the operation, the value of p will be 5.0 (10.0 / 2).

In Java, the expression x %= y is a compound assignment operator, which calculates the remainder of the division of x by y and assigns the result back to x. It is equivalent to the expression x = x % y.

If x is initially some numeric value and y is another numeric value, the result of the expression x %= y would be:

x = x % y;

Here's an example in Java:

public class CompoundAssignmentExample {
    public static void main(String[] args) {
        // Declare variables
        int x = 6;
        int y = 2;

        // Compound assignment
        x %= y;

        // Display the result
        System.out.println("The value of x after x %= y is: " + x);
    }
}

In this example, if x is initially 6 and y is 2, after the operation, the value of x will be 0 (the remainder of 6 divided by 2).

In Java, the expression a <<= 2 is a compound assignment operator that performs a left shift on the variable a by the number of bits specified on the right side of the <<= operator. It is equivalent to the expression a = a << 2.

Here's an example in Java:

public class CompoundAssignmentExample {
    public static void main(String[] args) {
        // Declare variables
        int a = 5;

        // Compound assignment (left shift by 2 bits)
        a <<= 2;

        // Display the result
        System.out.println("The value of a after a <<= 2 is: " + a);
    }
}

In this example, if a is initially 5, after the operation, the value of a will be 20. This is because the binary representation of 5 is 0000 0101, and left-shifting it by 2 bits results in 0001 0100, which is 20 in decimal.

In Java, the expression b >>= c is a compound assignment operator that performs a right shift on the variable b by the number of bits specified on the right side of the >>= operator. It is equivalent to the expression b = b >> c.

Here's an example in Java:

public class CompoundAssignmentExample {
    public static void main(String[] args) {
        // Declare variables
        int b = 12;
        int c = 2;

        // Compound assignment (right shift by 2 bits)
        b >>= c;

        // Display the result
        System.out.println("The value of b after b >>= c is: " + b);
    }
}

In this example, if b is initially 12, after the operation, the value of b will be 3. This is because the binary representation of 12 is 1100, and right-shifting it by 2 bits results in 0011, which is 3 in decimal.

In Java, the expression m &= 5 is a compound assignment operator that performs a bitwise AND between the variable m and the value 5. It is equivalent to the expression m = m & 5.

Here's an example in Java:

public class CompoundAssignmentExample {
    public static void main(String[] args) {
        // Declare variables
        int m = 10;

        // Compound assignment (bitwise AND with 5)
        m &= 5;

        // Display the result
        System.out.println("The value of m after m &= 5 is: " + m);
    }
}

In this example, if m is initially 10, after the operation, the value of m will be 0. This is because the binary representation of 10 is 1010, and performing a bitwise AND with 5 (binary 0101) results in 0000, which is 0 in decimal.

class PostAndPre
{
	public static void main( String args[])
	{
		int a = 2;
		int b = a++ - a++;
		System.out.println(b);
		System.out.println(a);
	}

}

class PostAndPre
{
	public static void main( String args[])
	{
		int a = 2;
		int b = a++ - a++;
		System.out.println(b);
		System.out.println(a);
	}

}

class PostAndPre
{
	public static void main( String args[])
	{
		int a = 2;
		System.out.println(a++ - a++ +" Now a = "+a);

	}

}

-1 Now a = 4