## Using Nested `for` Loops to Generate Patterns### Sample OutputIn this exercise, you'll learn how to use nested `for` loop statements to generate specific output patterns.```plaintext1. Do you want to start (Y/N): y2. Enter an integer (1 - 9): 123. ERROR! Should be positive, less than 10. REENTER: 4 1 22 333 44444. Do you want to continue (Y/N): y5. Enter an integer (1 - 9): 6 1 22 333 4444 55555 6666666. Do you want to continue (Y/N): y7. Enter an integer (1 - 9): 3 1 22 3338. Do you want to continue (Y/N): n```### Explanation1. **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:```1223334444```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.

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

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

7th Edition

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

Problem 1PE

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Concept explainers

Types of Loop

Loops are the elements of programming in which a part of code is repeated a particular number of times. Loop executes the series of statements many times till the conditional statement becomes false.

Loops

Any task which is repeated more than one time is called a loop. Basically, loops can be divided into three types as while, do-while and for loop. There are so many programming languages like C, C++, JAVA, PYTHON, and many more where looping statements can be used for repetitive execution.

While Loop

Loop is a feature in the programming language. It helps us to execute a set of instructions regularly. The block of code executes until some conditions provided within that Loop are true.

Question

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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.

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