The statements inside your source files are generally executed from left to right and top to bottom, in the order that they appear. You can use control flow statements in your programs to conditionally execute statements, to repeatedly execute a block of statements, and to otherwise change the normal, sequential flow of control. The Java programmin...

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while statement is used to continually execute a block of statements till a condition remains true. The general syntax of the while statement is: while (expression) { statement } First, the while statement evaluates expression, which must return a boolean value. If the expression returns true, then the while statement executes the statement...

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do-while statement is used to continually execute a block of statements till a condition remains true. The general syntax of the while statement is: do { statement(s) } while (expression); First, the do statement is executed at least once and then while evaluates expression, which must return a boolean value. If the expression returns true,...

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The for statement provides a compact way to iterate over a range of values. Programmers often refer to it as the "for loop" because of the way in which it repeatedly loops until a particular condition is satisfied. The general form of the for statement can be expressed as follows: for (initialization; termination; increment) { statement } T...

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The if-then statement is the most basic of all the control flow statements. It tells your program to execute a certain section of code only if a particular test evaluates to true. For example, the Fan class could allow the speed to decrease only if the fan is already in motion. One possible implementation of the decreaseSpeed method could be as fol...

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The if-then-else statement provides a secondary path of execution when an " if " clause evaluates to false. You could use an if-then-else statement in the decreaseSpeed method to take some action if the speed decrease is applied when the fan is not in motion. In this case, the action is to simply print an error message stating that the fan has alre...

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The enhanced for loop was introduced in Java 5. This is mainly used to iterate over an Array and Collection Implementations. The syntax of enhanced for loop is: for(declaration : expression) { //Statements } Declaration : The newly declared block variable, which is of a type compatible with the elements of the array you are accessing. The va...

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