2. Use nested for loops statements to generate the following output. Sample output: Do you want to start (Y/N): y Enter an integer (1 - 9) 12 ERROR! Should be positive, less than 10. REENTER: 4 1 22 333 4444 Do you want to continue (Y/N): y Enter an integer (1 - 9) 6 1 22 333 4444 55555 666666 Do you want to continue (Y/N): y

Database System Concepts
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ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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## Using Nested `for` Loops to Generate Patterns

### Sample Output

In this exercise, you'll learn how to use nested `for` loop statements to generate specific output patterns.

```plaintext
1. Do you want to start (Y/N): y
2. Enter an integer (1 - 9): 12
3. ERROR! Should be positive, less than 10. REENTER: 4

   1
   22
   333
   4444

4. Do you want to continue (Y/N): y
5. Enter an integer (1 - 9): 6

   1
   22
   333
   4444
   55555
   666666

6. Do you want to continue (Y/N): y
7. Enter an integer (1 - 9): 3

   1
   22
   333

8. Do you want to continue (Y/N): n
```

### Explanation

1. **Prompt for Continuation**: The program begins by asking if the user wants to start or continue with the process. The user inputs 'y' for yes or 'n' for no.

2. **Validate Input**: When the user opts to start or continue, they are prompted to enter an integer between 1 and 9. If an invalid number is entered (e.g., 12), the program displays an error message and prompts the user to re-enter a valid number.

3. **Generate Pattern**: Upon entering a valid integer, the program uses nested `for` loops to generate and display a pattern:

   - The outer loop runs from 1 to the integer entered.
   - The inner loop controls the repetition of the current index number.

For example, if the user enters the number 4, the loops generate the following pattern:
```
1
22
333
4444
```

4. **Repeat Process**: After displaying the pattern, the program asks the user if they want to continue. If 'y' is input, the process repeats; if 'n', the program terminates.
Transcribed Image Text:## Using Nested `for` Loops to Generate Patterns ### Sample Output In this exercise, you'll learn how to use nested `for` loop statements to generate specific output patterns. ```plaintext 1. Do you want to start (Y/N): y 2. Enter an integer (1 - 9): 12 3. ERROR! Should be positive, less than 10. REENTER: 4 1 22 333 4444 4. Do you want to continue (Y/N): y 5. Enter an integer (1 - 9): 6 1 22 333 4444 55555 666666 6. Do you want to continue (Y/N): y 7. Enter an integer (1 - 9): 3 1 22 333 8. Do you want to continue (Y/N): n ``` ### Explanation 1. **Prompt for Continuation**: The program begins by asking if the user wants to start or continue with the process. The user inputs 'y' for yes or 'n' for no. 2. **Validate Input**: When the user opts to start or continue, they are prompted to enter an integer between 1 and 9. If an invalid number is entered (e.g., 12), the program displays an error message and prompts the user to re-enter a valid number. 3. **Generate Pattern**: Upon entering a valid integer, the program uses nested `for` loops to generate and display a pattern: - The outer loop runs from 1 to the integer entered. - The inner loop controls the repetition of the current index number. For example, if the user enters the number 4, the loops generate the following pattern: ``` 1 22 333 4444 ``` 4. **Repeat Process**: After displaying the pattern, the program asks the user if they want to continue. If 'y' is input, the process repeats; if 'n', the program terminates.
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