Conditions
Conditions in VBA only have two purposes. To either determine something as true, or determine it as false. Depending on which one out of the two will be determined, Excel will decide whether something needs to be done or not. For example, if it is TRUE that a cell is colored red, the number inside it should be the following number in the series. Therefore, if the cell is not red, (i.e. FALSE) Excel will not do anything in this situation and will not add the next number in the series. If something is true, something else will happen. Or, if something is false, something else with either happen or not happen.
This is one of the most useful features of Excel coding and it is also the easiest one to grasp because there are only two possible choices for you to choose from and both of them are logical.