Self$-$Review Exercises

$4\mathrm{.}1$ Fill in the blanks in each of the following statements.

a$)$ Counter$-$controlled iteration is also known as $q,$ iteration because it's known in advance how many times the loop will be executed.

b$)$ Sentinel$-$controlled iteration is also known as $q,$ iteration because it's not known in advance how many times the loop will be executed.

c$)$ In counter$-$controlled iteration, a$($n$)q,$ is used to count the number of times a group of instructions should be repeated.