A __________ is commonly used to control the number of times that a loop iterates. a. counter variable b. test expression c. while clause d. controlled variable

A website sells three products whose retail prices are:Product 1: $2.98 - Product 2: $4.50 - Product 3: $9.98Write an app IN C# that reads a series of pairs of numbers below:a) product numberb) quantity soldYour app should use a switch statement to determine the retail price for each product. It should calculate and display the total retail value of all products sold. Use a sentinel-controlled loop to determine when the app should stop looping and display the final results (please explain each step, and the output needs to look like the image).

Problem Statement for High and Low Design a program that lets the user enter a series of numbers. The user should enter -99 to signal the end of the series. After all the numbers have been entered, the program should display the highest and lowest number in the series. Part 1. Understand the Problem The program will use a while loop to get the numbers from the user. It is not necessary for the individual numbers to be saved;each number can be evaluated as it is read in. To find the highest and lowest number in the series, use two variables. The variables are initialized by getting the first number from the user and assigning it to both the highest and lowest variables. The assumption is, that if there is only one number in the series it is both the highest and lowest numbers. Inside the loop, each number should be compared to the value stored in the highest variable and its value should replace the value in highest variable if it is greater than the number already there. The same can…

A while loop with an empty body contains no __________________________.   a. statements     b. curly braces     c. loop control variable     d. test within the parentheses of the while statement