Problem-Solving Activity 5: program that reads in 14 numbers

Which loop (while, do-while, or ) is best to use in the following situations?

The user must enter a set of exactly 14 numbers.

A menu must be displayed for the user to make a selection.

A calculation must be made an unknown number of times (maybe even no times).

A series of numbers must be entered by the user, and terminated by a sentinel value.

A series of values must be entered. The user specifies exactly how many.