What is wrong with the following programs?

• a

public class ShowErrors {
    public static void main(String[] args) {
        int i;
        int j = 5;

        if (j > 3)
            System.out.println(i + 4);
    }
}

• b

 public class ShowErrors {
     public static void main(String[] args) {
         for (int i = 0; i < 10; i++);
         System.out.println(i + 4);
     }
 }

Count the number of iterations in the following loops.

• a

int count = 0;
while (count < n) {
   count++;
}

• b

for (int count = 0;
   count <= n; count++) {
}

• c

int count = 5;
while (count < n) {
   count++;
}

• d

int count = 5;
while (count < n) {
    count = count + 3;
}

What is the keyword break for? What is the keyword continue for? Will the following programs terminate? If so, give the output.

int balance = 10;
while (true) {
    if (balance < 9)
       break;
    balance = balance - 9;
}
System.out.println("Balance is " + balance);

int balance = 10;
while (true) {
    if (balance < 9)
        continue;
    balance = balance - 9;
}
System.out.println("Balance is " + balance);

Identify and fix the errors in the following code: 1 public class Test { 2 public void main(String[] args) { 3 for (int i = 0; i < 10; i++); 4 sum += i; 5 6 if (i < j); 7 System.out.println(i) 8 else 9 System.out.println(j); 10 11 while (j < 10); 12 { 13 j ++; 14 } 15 16 do { 17 j ++; 18 } while (j < 10) 19 } 20 }

(Display numbers in a pyramid pattern) Write a nested for loop that prints the following output:

                1
              1 2 1
            1 2 4 2 1
          1 2 4 8 4 2 1
       1 2 4 8 16 8 4 2 1
     1 2 4 8 16 32 16 8 4 2 1
  1 2 4 8 16 32 64 32 16 8 4 2 1
1 2 4 8 16 32 64 128 64 32 16 8 4 2 1

Will the program work if n1 and n2 are replaced by n1 / 2 and n2 / 2 in line 17 in Listing 5.9?

Can you always convert a while loop into a for loop? Convert the following while loop into a for loop int i = 1; int sum = 0; while (sum < 10000) { sum = sum + i; i++; }

A blood pressure cuff that is too small for a patient's arm will give a __________?

Write a program that prompts the user to enter an integer from 1 to 15 and displays a pyramid.

(Display the ASCII character table) Write a program that prints the characters in the ASCII character table from ! to ~. Display 10 characters per line. The ASCII table is given in Appendix B. Characters are separated by exactly one space.

Write a program that reads an integer and displays all its smallest factors in increasing order. For example, if the input integer is 120, the output should be as follows: 2, 2, 2, 3, 5.

Another solution for Listing 5.9 to find the greatest common divisor of two integers n1 and n2 is as follows: First find d to be the minimum of n1 and n2, then check whether d, d-1, d-2, . . . , 2, or 1 is a divisor for both n1 and n2 in this order. The first such common divisor is the greatest common divisor for n1 and n2. Write a program that prompts the user to enter two positive integers and displays the gcd.

Can you convert a for loop to a while loop? List the advantages of using for loops.

(Find the largest n such that $n^{3}<12,000$) Use a while loop to find the largest integer n such that $n^{3}$ is less than 12,000.