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3.4.6 The While Loop

        The Java while loop is used to execute a set of statements repeatedly based on a given condition. It is used when the
        number of iterations is not known.
        The syntax of the while loop is:

        initialization;
        while(test condition)
        {
        // body of the loop
        increment or decrement;

        }
        Let us write a program to print the squares of numbers from 1 to 5. The following steps need to be performed.

        1.  Initialize number = 1
        2.  Test if the number <= 5
        3.  If yes, print the square of the number; Increment number (number = number + 1) Go back to step 2.
        4.  If no, exit the loop.

           The tasks that need to be performed repeatedly are in step 3 – these constitute the body of the loop. The test
           condition is in step 2. The corresponding Java code is given below:
        5.  The While Statement while (expression)
        public class WhileDemo

        {
        public static void main (String[ ] args)
        {
        int number = 1;

        while (number <= 5)
        {
        System.out.print (“Square of “ + number);
        System.out.println (“ = “ + number*number);
        ++number;

        }
        }
        }




















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