A loop repeats a set of statements until a condition is met. There are different types of loops like Do loops and For loops. Do loops check the condition at the end of each iteration while For loops check at the beginning. Accumulators are useful for keeping running totals as the loop iterates. The example code shows a Do While loop that uses the variable 'numShipments' as the accumulator to count the number of shipments until it reaches 50.

1. Quiz 9 review sheet.
1. Val()function is used to convert an entry in an input box to a number
2. A set of statements that perform a task over and over again based on a condition is called a
loop.
3. A Do…Loop begins after the Boolean condition loops at least once. If the condition is true, the
loop repeats.
4. Repeating a set of statements is called iteration.
5. Accumulators are useful to keep running totals.
6. Do While quantity < 50
numShipments += 1
inStock += quantityReceived
Loop
Which variable is the accumulator? Quantity
7. Given the following statements:
Dim x As Integer = 0
Do
x = x + 2
Loop While x < 10
The Do Loop will execute 5 times. If x = 0, x + 2 = 2, loop, x + 2 = 4, loop, x + 2 = 6, loop, x + 2 =
8, loop, x + 2 = 10. Looping stops because x reaches 10. How many times did it loop? 5
including the first x + 2 = 2.
8. Given the following statements:
For x As Integer = 1 To 11
MessageBox.Show(x)
Next x
How many message boxes will be displayed? 12
9. The following statements would create an infinite loop.
Dim x As Integer = -2
Do While x < 0
x = x + 1
Loop
The answer is False.
10. Convert()is used to convert an entry in an input box to a number.
11. A flag is a condition that is used to run a program.
12. Given the following code segment:

2. Dim a As Integer = 0
Dim b As Integer = 0
Do While a < 10
b += a
Loop
Me.lblMessage.Text = b
Which output will be displayed? 0