Android™ How to Program, Second Edition

C.7. while Repetition Statement

As an example of Java’s while repetition statement, consider a program segment that finds the first power of 3 larger than 100. Suppose that the int variable product is initialized to 3. After the following while statement executes, product contains the result:

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while ( product <= 100 )   product = 3 * product;

When this while statement begins execution, the value of variable product is 3. Each iteration of the while statement multiplies product by 3, so product takes on the values 9, 27, 81 and 243 successively. When variable product becomes 243, the while-statement condition—product <= 100—becomes false. This terminates the repetition, so the final value of product is 243. At this ...