Java, A Beginner's Guide, 5th Edition, 5th Edition

Some Variations on the for Loop

The for is one of the most versatile statements in the Java language because it allows a wide range of variations. For example, multiple loop control variables can be used. Consider the following program:

Here, commas separate the two initialization statements and the two iteration expressions. When the loop begins, both i and j are initialized. Each time the loop repeats, i is incremented and j is decremented. Multiple loop control variables are often convenient and can simplify certain algorithms. You can have any number of initialization and iteration statements, but in practice, more than two or three make the ...