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cgi programming

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cgi programming cgi programming When we wrote System.out.println("Hello World!"); in the first program we were using the System.out.println() method.

cgi programming (To be more precise we were using the println() method of the out member of the System class, but we'll talk more about that in Chapter 4.) The System.out.println() method actually requires quite a lot of code, but it is all stored for us in the System libraries. Thus rather than including that code every time we need to print, we just call the System.

cgi programming out.println() method.You can write and call your own methods too. Let's look at a simple example. Java has no built-in factorial method so we'll write one.

cgi programming The following is a simple program that requests a number from the user and then calculates the factorial of that number. We'll use two methods in the program, one that checks to see if the user has in fact entered a valid positive integer, and another that calculates the factorial. However we'll start by writing the main method of the program:class Factorial { public static void main(String args[]) { int n; while ((n = getNextInteger()) >= 0) { System.out.println(factorial(n)); } } // main ends here}Among other things this code demonstrates that methods make it possible to design the flow of a program without getting bogged down in the details.

cgi programming

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cgi programming