Question 10 int x = 10; int y = 0; while (x >= 5 && x <= 20) {
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 10
```cpp
int x = 10;
int y = 0;
while (x >= 5 && x <= 20) {
cout << "hello world ";
x = x + 4;
}
```
**Question:**
How many times does this code execute the line `cout << "hello world "`?
**Options:**
- ○ 4
- ○ 3
- ○ 5
- ○ 2
**Explanation:**
This code initializes `x` to 10 and enters a `while` loop that will continue as long as `x` is between 5 and 20 (inclusive). Inside the loop, it prints "hello world" and then increments `x` by 4.
Steps of execution:
1. Initial `x = 10`. Condition `10 >= 5 && 10 <= 20` is true.
2. Print "hello world". Update `x = 14`.
3. Condition `14 >= 5 && 14 <= 20` is true.
4. Print "hello world". Update `x = 18`.
5. Condition `18 >= 5 && 18 <= 20` is true.
6. Print "hello world". Update `x = 22`.
7. Condition `22 >= 5 && 22 <= 20` is false. Exit the loop.
Thus, the line `cout << "hello world"` executes 3 times. The correct answer is option ○ 3.
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