# Rectangle
The height and width of the rectangle must be greater than zero.
Problem Statement
Write the code to provide validation for the Rectangle class. The solution must meet the following requirements (new requirements are in bold):
- Should get and set the height and the width
- Should calculate the area, the perimeter and the diagonal
- The formula for the diagonal is √(〖width〗^2 + 〖height〗^2 )
- Should determine if the rectangle is a square
- Should require the height and width to be greater than zero
Use the following class diagram when creating your solution.