WHAT IS A BOOLEAN VARIABLE?
Example program ——> COMPARE.ADA Examine the program named COMPARE.ADA for an example of logical compares being used in a very trivial way. We declare and initialize three INTEGER type variables for use later then declare two variables of type BOOLEAN in lines 14 and 15, with the first one being initialized to TRUE. A BOOLEAN type variable has a very limited range of values which can be assigned to it, namely TRUE or FALSE, and there are no mathematical operations available for use on variables of type BOOLEAN. Much more will be said about the BOOLEAN type variable later in this tutorial, but we need a basic understanding of a boolean variable in order to study program control in the next chapter. Lines 19 and 23 illustrate how you can assign a value of either TRUE or FALSE to a BOOLEAN variable. These illustrate literal assignment in much the same way that a literal value can be assigned to an INTEGER type variable. Because we wish to display BOOLEAN values, we instantiate a copy o
