Make Matches clear with Braces

Sometimes you must use braces { and } to say what you want. An else inside of a pair of braces must match an if also inside that pair. Sometimes you don't need braces, but use them to make clear (to human readers) what you intend. Here is the complete rule for matching ifs and elses:

Rule for Matching if and else:   Within each pair of matching braces: Start with the first if and scan downward. Each else matches the first unmatched if above it. An if matches only one else and an else matches only one if. Some ifs will not have a mathcing else, but each else will have a matching if.

Here is a program fragment that uses braces. The blue if matches the blue else. The braces are needed to make this so.