Another part of the puzzle.
In an earlier article we briefly discussed the start, stop, and flow symbols. Now let us add one more symbol. Now let's add the rectangle to represent process or arithmetic calculation. Computers have memory. We can represent a piece of memory with a symbol known as a variable. Variables can change value at any time we want them to. Usually when we change a variable, we assign a new value to it or we just want to define a part of memory to a particular variable. In this case, we want define part of memory to be known as "A" and then assign the value of zero to it. We could also say that "A" was assigned a starting value of zero sort of like algebra you may have learned in school. So the program above starts, then assigns the value of zero to "A", and then just stops So far that does not seem very practical, but it is still a program. So now so far, we have four tools to work with. Let's review. Every program must have a starting an...