CP M4 Repetition & Loops

A __________________ is a collection of commands that are given a name.

True or False. Every WHILE loop can be replaced with FOR loop.

• True

• False

Variable used to end the loop

• Loop control variable

• count variable

While loops should always be:

• output

• indented

• calculated

• input

For a loop to stop, the loop control variable must ________________.

• change

• be input from the keyboard

• be true

• change inside the loop

What is wrong with:

x = 1

while (x < 20):

print (x)

• There is no x = 0 before the loop

• The loop will not stop since the condition is wrong

• x should be c

• The loop will not stop since x never changes

Why do we use loops?

• Because computers can do calculations humans can't.

• Because programming is an important skill

• Because of efficiency.

• Because programs need to make decisions.

Consider the following code:

x = 9

sum = 0

while (x < 19):

x = x + 1

num = int(input("Enter a number: "))

sum = sum + num

print (str(x) + ": " + str(num) + " Total: " + str(sum))

Which of the following is the loop-control variable?

• num

• sum

• x

• int

Which of the following is NOT true about while loops?

• A way of repeating a code

• Use conditions like if statements

• Used to create functions

• Give us more control over how the program runs

Which of the following is NOT a rule for algorithms?

• They produce a result.

• They have an order.

• They repeat indefinitely.

• They have clear instructions.