91Ó°ÊÓ

Write an input validation loop that asks the user to enter "Yes" or "No".

Write a for loop that repeats seven times, asking the user to enter a number. The loop should also calculate the sum of the numbers entered.

Why should you be careful when choosing a sentinel value?

What is the difference between an input file and an output file?

What classes do you use to read data from a file?

Assume \(x\) is an int variable, and rand references a Random object. What does the following statement do? \(x=\) rand \(.\) next \(\operatorname{Int}(1)\)