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
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
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Question

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.
- If x is divisible by 3 which means it gives the remainder 0 if divided by 3.
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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