Answer to Question #211939 in Java | JSP | JSF for Simon

Question

Give an example of a while loop, then provide the equivalent do-while loop and for loop. Then give a different example of a do-while loop, along with the equivalent while loop and for loop. Finally, give an example of a for loop, along with the equivalent while loop and do-while loop. Use your examples to illustrate the advantages and disadvantages of each looping structure, and describe those advantages and disadvantages.

Answer 1

1.

public class Main
{
	public static void main(String[] args) {
	    //while loop
	    System.out.println("while loop");
		int i = 0;
        while (i < 5) {
          System.out.println(i);
          i++;
        }
        //do while loop
        System.out.println("do while loop");
        int j = 0;
        do {
          System.out.println(j);
          j++;
        }
        while (j < 5);
        //for loop
        System.out.println("for loop");
        for(int n=0;n<5;n++){
           System.out.println(n); 
        }
	}
}

2.

public class Main
{
	public static void main(String[] args) {
	    int m =5;
        //do while loop
        System.out.println("do while loop");
        int j = 0;
        do {
          System.out.println(j*m);
          j++;
        }
        while (j < 5);
	    //while loop
	    System.out.println("while loop");
		int i = 0;
        while (i < 5) {
          System.out.println(i*m);
          i++;
        }
        
        //for loop
        System.out.println("for loop");
        for(int n=0;n<5;n++){
           System.out.println(n*m); 
        }
	}
}

3.

public class Main
{
	public static void main(String[] args) {
	    int m =100;
        
        //for loop
        System.out.println("for loop");
        for(int n=0;n<5;n++){
           System.out.println(n*m); 
        }
        
	    //while loop
	    System.out.println("while loop");
		int i = 0;
        while (i < 5) {
          System.out.println(i*m);
          i++;
        }
        //do while loop
        System.out.println("do while loop");
        int j = 0;
        do {
          System.out.println(j*m);
          j++;
        }
        while (j < 5);
	}
}