Question

How many times will "hello" print?

int x = 1;
while (x < 10) {
cout << "hello" << endl;
x *= 2;
}

A. 4
B. 8
C. 4
D. 10

Answer 1

The "hello" statement in the C++ while loop will print 4 times as 'x' is doubled each time, and the loop runs until 'x' is no longer less than 10. The correct answer is A. 4.

Step-by-step explanation:

The code provided is a C++ program that uses a while loop. The value of 'x' starts from 1 and is multiplied by 2 on each iteration of the loop. The loop will continue as long as 'x' is less than 10. Given the condition of the loop (x < 10), let's see how it progresses:

• Iteration 1: x = 1; 1 < 10 is true; hello is printed.
• Iteration 2: x = 2; 2 < 10 is true; hello is printed.
• Iteration 3: x = 4; 4 < 10 is true; hello is printed.
• Iteration 4: x = 8; 8 < 10 is true; hello is printed.
• Iteration 5: x = 16; 16 < 10 is false; the loop ends.

Therefore, "hello" will be printed 4 times before 'x' becomes 16 and the condition x < 10 becomes false, stopping the loop. The correct answer is A. 4.