Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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In Java create the class TransformToDOWhileLoops ,type in the code given, and run your program to print the shown output. Then, transform the 2 for-loops of the given code into 2 DO-WHILE-loops so your program prints the same output as it did using the 2 for-loops. No credit if while-loops are used instead of do-while loops.

### Java Code Example: Nested Loops with Conditional Statements

**Java Code:**
```java
public class TransformToDOWIWhileLoops
{
    public static void main(String[] ar)
    {
        for (int i = 1; i <= 9; ++i)
        {
            if (i % 2 == 0)
                continue;
            for (int j = 1; j <= i + 1; j += 2)
                System.out.print(j + " ");
            System.out.println();
        }
    }
}
```

**Explanation:**

This Java program demonstrates the use of nested `for` loops and a `continue` statement:

- **Main Class and Method**: 
  The program is encapsulated in a class named `TransformToDOWIWhileLoops`, and execution starts from the `main` method.

- **Outer For Loop** (`for (int i = 1; i <= 9; ++i)`):
  - Iterates `i` from 1 to 9.
  - Checks if `i` is even using `i % 2 == 0`. If true, it uses `continue` to skip the rest of the loop’s body for that iteration.

- **Inner For Loop** (`for (int j = 1; j <= i + 1; j += 2)`):
  - Iterates `j` from 1 up to `i + 1` in steps of 2.
  - Prints `j` followed by a space.

- **Output**: 
  Each line of the output corresponds to a complete pass of the inner loop. The console will output, line by line:
  ```plaintext
  1
  1 3
  1 3 5
  1 3 5 7
  1 3 5 7 9
  ```
- **Build Success**: 
  Indicates the program compiled and ran successfully with zero execution time reported.

This code is useful for illustrating how nested loops work and how conditional statements can influence loop control flow.
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Transcribed Image Text:### Java Code Example: Nested Loops with Conditional Statements **Java Code:** ```java public class TransformToDOWIWhileLoops { public static void main(String[] ar) { for (int i = 1; i <= 9; ++i) { if (i % 2 == 0) continue; for (int j = 1; j <= i + 1; j += 2) System.out.print(j + " "); System.out.println(); } } } ``` **Explanation:** This Java program demonstrates the use of nested `for` loops and a `continue` statement: - **Main Class and Method**: The program is encapsulated in a class named `TransformToDOWIWhileLoops`, and execution starts from the `main` method. - **Outer For Loop** (`for (int i = 1; i <= 9; ++i)`): - Iterates `i` from 1 to 9. - Checks if `i` is even using `i % 2 == 0`. If true, it uses `continue` to skip the rest of the loop’s body for that iteration. - **Inner For Loop** (`for (int j = 1; j <= i + 1; j += 2)`): - Iterates `j` from 1 up to `i + 1` in steps of 2. - Prints `j` followed by a space. - **Output**: Each line of the output corresponds to a complete pass of the inner loop. The console will output, line by line: ```plaintext 1 1 3 1 3 5 1 3 5 7 1 3 5 7 9 ``` - **Build Success**: Indicates the program compiled and ran successfully with zero execution time reported. This code is useful for illustrating how nested loops work and how conditional statements can influence loop control flow.
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