Answer to Question #314782 in Java | JSP | JSF for Unicorn

Question

Write Java statements that accomplish the following.

1. Declare int variables x and y.

2. Initialize an int variable x to 10 and a char variable ch to 'B'.

3. Update the value of an int variable x by adding 5 to it.

4. Declare and initialize a double variable payRate to 12.50.

5. Copy the value of an int variable firstNum into an int variable tempNum.

6. Swap the contents of the int variables x and y. (Declare additional variables, if

necessary.)

7. Suppose x and y are double variables. Output the contents of x, y, and the expression

x + 12 / y – 18.

8. Declare a char variable grade and set the value of grade to 'A'.

9. Declare int variables to store four integers.

10. Copy the value of a double variable z to the nearest integer into an int variable x

Answer 1

public class Operations {

    // 8. Declare a char class variable and set the class value to "A".
    public char ch1 = 'A';

    public static void main(String[] args) {
        // 1. Declare variables of type int x and y.
        int x, y;
        x = 10;
        y = 10;
        // 2. Initialize variable x with value 10 and variable ch with value 'B'.
        char ch = 'B';
        // 3. Update the value of the int variable x with 5 added to it.
        x += 5;
        // 4. Declare and initialize the double payRate variable with a value of 12.50.
        double payRate = 12.50;
        // 5. Copy the value of int firstNum to int tempNum.
        int firstNum = 7;
        int tempNum = firstNum;
        // 6. Swap the contents of the int x and y variables. (Declare additional variables if necessary.)
        int u;
        u = x;
        x = y;
        y = u;
        // 7. Assume that x and y are double variables. Print the contents of x, y and the expression x + 12 / y - 18.
        double c = (x + (12 / y))-18;
        System.out.printf("x = %d, y = %d, expression x + 12 / y – 18 = %.2f", x, y, c);
        System.out.println("");
        // 9. Declare variables of type int to store four integers.
        int[] arr = new int[4];
        // 10. Copy the value of a variable of type double z up to the nearest integer into a variable of type int x.
        double z = 16.48;
        x = (int) z;
        System.out.print(x);
    }
}