Riemann Sums

Description

Riemann Sums allows you to input a function in terms of x, an interval, and the number of rectangles.
It will then give you 7 choices: Left, Right, Midpoint, Trapezoidal, All, About, and Quit. The first
four choices allow you to perform individual calculations. Choosing All performs all of the first
four options. Choosing About gives information about the program. Choosing Quit ends the program.
If you choose any of the options except Quit, after execution a popup will appear asking to run the
program again or quit.