C++

8.8    The “for” Loop

You have seen in the while loop that you often initialize a counter variable for the loop and then increment it at the end of the loop. Because this is so common, it is packed together and thus simplified in the for loop:

for( Initialization ; Condition ; Update ) Statement

Statement and Initialization are statements, while Condition and Update are expressions.

It is common to define a loop variable in the initialization, modify it in the update, and check it in the condition.

A for loop corresponds to this well-organized while loop:

{ Initialization ; while( Condition ) { Statement ; Update ; } }

In Figure 8.5, you can see the process schematically.

I will rewrite Listing 8.12 into a for loop in the following listing. ...