
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Question
Output a half pyramid of stars with a height determined by the user. If the user enters a number less than one, exit. Write the code in java and use the test case example as reference

Transcribed Image Text:### Test Case 7
**Prompt:**
- Enter a height:
- User input: `30`
**Output:**
- A right-aligned triangle of asterisks (`*`) with 30 rows.
- Each row contains an increasing number of asterisks starting from 1 up to 30, with the first line having one asterisk and the last line having 30 asterisks.
**Structure:**
- Row 1: `*`
- Row 2: `**`
- Row 3: `***`
- ...
- Row 30: `******************************`
### Test Case 8
**Prompt:**
- Enter a height:
- User input: `-32432`
**Output:**
- Error Message: "Height must be at least one."
### Explanation
The diagrams demonstrate how the user inputs a height to generate a triangle made of asterisks. The input should be a positive integer, as negative values result in an error message.

Transcribed Image Text:### Pattern Printing: Test Cases and Results
#### Test Case 1
- **Input:**
- Prompt: "Enter a height"
- User enters: `5`
- **Output:**
```
*
**
***
****
*****
```
#### Test Case 2
- **Input:**
- Prompt: "Enter a height"
- User enters: `1`
- **Output:**
```
*
```
#### Test Case 3
- **Input:**
- Prompt: "Enter a height"
- User enters: `10`
- **Output:**
```
*
**
***
****
*****
******
*******
********
*********
**********
```
### Explanation
The above test cases demonstrate a simple algorithm that prints a right-angled triangle pattern of asterisks. The user is prompted to enter a height, and then a triangle with that many rows is printed, where each row contains a number of asterisks equal to the row number.
- In **Test Case 1**, a height of 5 results in a triangle with 5 rows.
- In **Test Case 2**, a height of 1 results in a single asterisk.
- In **Test Case 3**, a height of 10 results in a larger triangle with 10 rows.
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