6.6. Chapter Review

Note that the course policy is that you should not use generative AI without authorization. If you are suspected to have used generative AI and not able to explain/reproduce your work when requested, all your related assignments throughout the semester will be regraded as 0.
Prepare this assignment using a Word document.
Number and write answers under each question.
Paste code screenshots when required.

When might you prefer a for loop in place of a while loop? What do you gain?
When might you prefer a while loop or a foreach instead of a for loop?
Describe in general when a foreach loop is going to be easier to use than a while loop.
Each sentence below introduces a problem. What words/combinations suggest a loop/repetition?
1. Square each number from 1 to n.
2. Respond until the user says to stop.
3. Repeat the process until the width is < .00001.
4. Count the vowels in the sentence that you are given.
5. See if there are any double letters in the word that you are given.
Compare do-while and while loops: How do you think about which one to use?
In general, what causes an infinite while loop?
A while loop is generally terminated when the program evaluates the condition in its heading and it becomes false. How else can a program exit from a while loop?
When inside a loop, a return statement should generally only appear as a sub-statement of what kind of statement?

Which of these conditions is safer in general, with arbitrary string s and int i?

s[i] != '#' && i >= 0 && i < s.Length

i >= 0 && i < s.Length && s[i] != '#'

What is printed?

//          012345678901234567890
string s = "Is coding cool? Yes!"
Console.WriteLine(s.Trim());
string t = s.Substring(9, 8);
Console.WriteLine(t.Replace(" ", "/"));
Console.WriteLine(t.Trim().Replace(" ", "/"));
Console.WriteLine(s.StartsWith("is"));
Console.WriteLine(s.ToLower().StartsWith("is"));
int i = s.IndexOf("co"), j = s.IndexOf("co", i+1),
    k = s.IndexOf("co", j+1);
Console.WriteLine(i + " " + j + " " + k);