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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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

### 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.
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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.
### 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.
expand button
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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