Class 24

Question 1

In a for … in loop, where does the loop variable get its values?

Answer 1

from the list of values following the keyword in

Question 2

In a simple for loop, where does the loop variable get its values?

Answer 2

from the command line arguments

Question 3

Should the loop variable in a for loop have a $ in front of it?

Answer 3

no

Question 4

In a three statement for loop, what does the first statement do?

Answer 4

sets the initial value of a loop variable

Question 5

In a three statement for loop, what does the second statement do?

Answer 5

it’s a logical expression and the loop will continue as long as its value is true

Question 6

In a three statement for loop, what does the third statement do?

Answer 6

changes the value of the loop variable after each pass through the loop

Question 7

Why are the three statements in a three statement for loop surrounded by two parentheses?

Answer 7

so the values of all variables will be treated as numbers

Question 8

When does a while loop stop running?

Answer 8

when the command following while returns an exit status that is not 0

Question 9

What does the continue command in a loop do?

Answer 9

stops that pass through the loop and returns to the top of the loop

Question 10

What does the break command in a loop do?

Answer 10

jumps completely out of the loop