IT 116: Introduction to Scripting - Answers to Class 9 Ungraded Quiz

IT 116: Introduction to Scripting
Answers to Class 9 Ungraded Quiz

In the loop below, what happens each time the boolean expression after the keyword while evaluates to true?
```
while num < 10:
     num = num + 1
```
```
the value of num increases by 1
```
If the value of the variable num is 0 before entering the loop above, how many times does the indented statement run?
```
10
```
If the value of the variable num is 0 before entering the loop above, what is the value of the variable num after the loop stops running?
```
10
```
What happens in a while loop when the boolean expression after the keyword while becomes false?
```
the loop stops
```

What is unusual about the following code?

num = 5
while num > 0:
    print(num)

it will never stop

What do you call a loop that does not stop?
```
an infinite loop
```
If you want to stop a Python script running on Unix, what do you do?
```
Control C
```
Will a while loop with the following header ever stop?
```
while True:
```
```
no
```
What do you call the process of checking that a value entered by a user is correct?
```
data validation
```
What do you call a statement that contains other statements?
```
a compound statement
```