91影视

Loops are needed in programming languages: a. to facilitate sequential processing of data b. to enable a variable to be analyzed for additional processing c. to process files stored on hard drives d. to allow statements to be repeated e. all of the above

To write a sentinel-controlled loop to compute the average temperature during the month of July in Florida, the best option for a sentinel value would be: a. 67 b. 1000 c. 100 d. 鈥渉igh temperature鈥� e. none of the above

Which loop structure can only be used with a collection or array? a. foreach b. for c. while d. do...while e. none of the above

If a loop body must be executed at least once, which loop structure would be the best option? a. foreach b. for c. while d. do...while e. none of the above

If a loop body uses a numeric value that is incremented by three with each iteration through the loop until it reaches 1000, which loop structure would probably be the best option? a. foreach b. for c. while d. do...while e. none of the above

When used with a while statement, which jump statement causes execution to halt inside a loop body and immediately transfers control to the conditional expression? a. break b. goto c. return d. continue e. none of the above

pretest conditional expression that enables a loop to be executed as long as the counter variable is less than 10? a. do while (coun鈥� # Which of the following is a valid C# pretest conditional expression that enables a loop to be executed as long as the counter variable is less than 10? a. do while (counter < 10) b. while (counter < 10) c. foreach (counter in 10) d. none of the above e. all of the above

Which of the following for statements would be executed the same number of times as the following while statement? int茠num茠=茠10; while(num茠>茠0) Console.WriteLine(num); num鈥�; a. for (num = 0; num < 10; num++) b. for (num = 1; num < 10; num++) c. for (num = 100; num == 10; num+=10) d. for (num = 10; num < 0; num--); e. none of the above

If aValue, i, and n are type int variables, what does the following program fragment do? \(\begin{aligned} \text { avalue }=0 ; & n=10 ; \\ \text { for }(i=n ; \quad i>0 ;&i--) \\ \text { if }\left(i \quad \frac{0}{8} 2=\right.&0) \\ & \text { avalue }=\text { avalue }+i \end{aligned}\) a. computes the sum of the integers from 1 through n b. computes the sum of the integers from 1 through n - 1 c. computes the sum of the even integers from 1 through n d. computes the sum of the odd integers from 1 through n e. none of the above

To produce the output 2 4 6 8 10 which should be the loop conditional expression to replace the question marks? int \(n=0 ;\) do \(n=n+2 ;\) Console.Write \(\left("\\{0\\} \backslash t^{\prime \prime}, n\right) ;\) while (????); a. n < 11 b. n < 10 c. n < 8 d. n > = 2 e. n > 8