Question 8 int x = 10; while ( x >= 5 && x <= 20) { } if (x % 3 == { O } x = x + 1; 0 5 // How many times does this code execute the line cout << "hello world" 4 3 0) cout << "hello world"; 2

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
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## Question 8

```cpp
int x = 10;

while ( x >= 5 && x <= 20 )
{
    if ( x % 3 == 0 )
    {
        cout << " hello world ";
    }
    x = x + 1;
}
```

**Question:**  
How many times does this code execute the line `cout << "hello world"`?

**Options:**
- 5
- 4
- 3
- 2

### Explanation

The code initializes an integer variable `x` with the value of 10. It then enters a `while` loop that continues as long as `x` is between 5 and 20, inclusive. Inside the loop, there is a condition that checks if `x` is divisible by 3 (`x % 3 == 0`). If true, it prints "hello world". After checking and potentially printing, it increments `x` by 1.

To determine how many times "hello world" is printed, identify the values of `x` that satisfy the condition:

- `x = 10` (not printed)
- `x = 11` (not printed)
- `x = 12` (printed)
- `x = 13` (not printed)
- `x = 14` (not printed)
- `x = 15` (printed)
- `x = 16` (not printed)
- `x = 17` (not printed)
- `x = 18` (printed)
- `x = 19` (not printed)
- `x = 20` (not printed)

The line `cout << "hello world"` is executed **3 times**.
Transcribed Image Text:## Question 8 ```cpp int x = 10; while ( x >= 5 && x <= 20 ) { if ( x % 3 == 0 ) { cout << " hello world "; } x = x + 1; } ``` **Question:** How many times does this code execute the line `cout << "hello world"`? **Options:** - 5 - 4 - 3 - 2 ### Explanation The code initializes an integer variable `x` with the value of 10. It then enters a `while` loop that continues as long as `x` is between 5 and 20, inclusive. Inside the loop, there is a condition that checks if `x` is divisible by 3 (`x % 3 == 0`). If true, it prints "hello world". After checking and potentially printing, it increments `x` by 1. To determine how many times "hello world" is printed, identify the values of `x` that satisfy the condition: - `x = 10` (not printed) - `x = 11` (not printed) - `x = 12` (printed) - `x = 13` (not printed) - `x = 14` (not printed) - `x = 15` (printed) - `x = 16` (not printed) - `x = 17` (not printed) - `x = 18` (printed) - `x = 19` (not printed) - `x = 20` (not printed) The line `cout << "hello world"` is executed **3 times**.
Expert Solution
Step 1

The program performs the following:

  • Initially x is initialized to 10.
  • The while loop executes when the condition that x >= 5 and x<=20 are True.
    • If x is divisible by 3 which means it gives the remainder 0 if divided by 3.
      • Print "hello world" if True.
    • Increment x by 1.

The program simply executes the while loop until x is less than equal to 20 and the text hello world is printed if x is divisible by 3.

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