What are some unconventional uses of the three sections inside the parentheses of a for loop? Show at least three examples using code.

Question

What will be an ideal response?

Answer 1

Initialization of more than one variable int the first section by placing commas between the separate statements, as in the following:for(g = 0, h = 1; g < 6; ++g)Performance of more than one test using compound conditions in the second section, as in the following:for(g = 0; g < 3 && h > 1; ++g)Decrementation or performance of some other task in the third section, as in the following:for(g = 5; g >= 1; --g)Performing multiple actions in the third section, separated by commas, as in the following:for(g = 0; g < 10; ++g, ++h, sum += g)You can leave one or more portions of a for loop empty, although the two semicolons are still required as placeholders. For example, if x has been initialized in a previous program statement, you might write the following:for(; x < 10; ++x)Declare a variable within a for statement, as in the following:
for(int val = 1; val < 11; ++val)
You might use method calls in any section of the for statement, as in the following example. Here, the isFinished() method would be required to return a Boolean value and the alter() method would be required to return a data type accepted by x.for(x = initMethod(); isFinished(); x = alter(x))