What is the primary purpose of a while loop in programming and how does it differs from a for loop?

True or False When a variable is declared in the initialization expression of a for loop, the scope of the variable is limited to the loop.

Using a Sentinel Value to Control a while Loop in C++ In this lab, you write a while loop that uses a sentinel value to control a loop in a C++ program that has been provided. You also write the statements that make up the body of the loop. The source code file already contains the necessary variable declarations and output statements. Each theater patron enters a value from 0 to 4 indicating the number of stars the patron awards to the Guide’s featured movie of the week. The program executes continuously until the theater manager enters a negative number to quit. At the end of the program, you should display the average star rating for the movie. Instructions Ensure the source code file named MovieGuide.cpp is open in your code editor. Write the while loop using a sentinel value to control the loop, and write the statements that make up the body of the loop. The output statements within the loop have already been written for you. Ensure you include the calculations to compute the...

PROGRAMMING LANGUAGE: C++ALSO PASTE SCREENSHOTS OF OUTPUTS Write a program that takes +,-,*, and / operators and performs the required operation. the program will continue to execute until ESC key is pressed. Also, the usage of post-test loop and switch statement is mandatory.