C# Windows Forms Programming

After doing all parts of the lesson you should be able to answer these questions.

True or False: A loop always executes at least once.

False, do loops always execute at least once, for and while loops execute zero or more times.

What would be shown in the listbox by the code shown below:

int num = 4;
do
{
     num = num - 1;
     listBox1.Items.Add(num);
     listBox1.Items.Add("done");
} while (num <= 0);

3
done

3 What best describes this loop: int num = 1; while(num>0) { num += 2;}

endless

4 What best describes this loop: int num = 0; while(num>0) { num += 2;}

executes 0 times

5 What would be put in the listbox by this code:
for(int num = 0; num < 3; num++) {
listBox1.Items.Add(num);}

0, 1, 2

6 What would be shown in the listbox by this code:
for(int num=5; num>0; num--) {
lstBox.Items.Add num;
}

5, 4, 3, 2, 1

7 What are the 3 types of loops?

for, while, do (there is also a foreach that is not in this lesson)

8 True or False: A for loop always executes at least once.

False

9 True or False: A do loop always executes at least once.

True

Please review the material for any questions you miss.

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