What & How to use Variables, Constants, and Calculations in VB.Net Programming

This post teaches you to write programs that involve the calculation of values for display to a form.  In order to calculate values, you will often need to compute intermediate values and this will involve the storage of values to memory locations called variables.  You will learn how to declare variables to store different types of data, and to convert text data to numeric data, to format output, and use Try-Catch blocks to catch data processing exceptions (also termed errors).  You will also use message boxes to display messages to the application user.