Hi I started working on this do while loop and I am stuck on it.. I cannot conce

Question

Hi I started working on this do while loop and I am stuck on it.. I cannot conceptualize what it is I need to do. Please help!!!

Also I need help with section E as well because I am really bad at loops because I cannot think of how it works in my head quickly enough.

For part D I dont know how to ask continuously and also I am not sure if the logic is there..

THANK YOU!! This is for my study guide for my in class programming exam for BlueJ thank you

public static void sectionD()

{

/*

* Using a do/while loop, write a code segment that keeps on asking the user to enter a

* positive integer from 1 to 10 and enter a negative integer to stop. If the user

* enters a negative integer stop the loop, and if the user enters a number that

* is not in the range 1-10, output the message: "Input not in the range." and ask

* the user for a number again.

*/

int input = 0;

Scanner console= new Scanner(System.in);

do

{

System.out.println("Enter a number in the range 1-10, or enter a negative number to stop:");

input =console.nextInt();

if(input <1 || input >10)

{

System.out.println("Input not in range.");

System.out.println("Enter a number in the range 1-10, or enter a negative number to stop:");

input =console.nextInt();

}

else if(input >=1 || input <=10)

  

System.out.println("Enter a number in the range 1-10, or enter a negative number to stop:");

input =console.nextInt();

} while ( input <0 );

  

}

  

public static void sectionE()

{   

/*

* Write a code segment that asks the user for an integer in the range 3-9.

* Your code should output a pattern of numbers as shown below.

* Use two nested for loops.

* If the user enters 5, the pattern is:

* 1

* 12

* 123

* 1234

* 12345

*   

* If the user enters 7, the pattern is:

* 1

* 12

* 123

* 1234

* 12345

* 123456

* 1234567

*/

  

  

}

}

Explanation / Answer

1. import java.util.*;
2. import java.io.*;
3. class Ideone
4. {
5. Scanner console=new Scanner(System.in);
6. int input;
7. public void sectionD()
8. {
9. do
10. {
11. System.out.println("Enter a number in the range 1-10, or enter a negative number to stop:");
12. input=console.nextInt();
13. if(input==0 || input>10)
14. {
15.   System.out.println("Input not in the range.");
16. continue;
17. }
18. else if(input<0)
19. {
20. System.out.println("Input is negative. Program stopping...");
21. break;
22. }
23. else continue;
24. }while(true);
25. }
27. public void sectionE()
28. {
29.   System.out.println(" Enter a number in the range 3-9 : ");
30. input=console.nextInt();
31. for(int i=1; i<=input; i++)
32. {
33. for(int j=1; j<=i; j++) System.out.print(j);
34.   System.out.println();
35. }
36. }
37. public static void main (String[] args)
38. {
39. Ideone in = new Ideone();
40. in.sectionD();
41. in.sectionE();
42. }
43. }

import java.util.*; import java.io.*; class Ideone { Scanner console=new Scanner(System.in); int input; public void sectionD() { do { System.out.println("Enter a number in the range 1-10, or enter a negative number to stop:"); input=console.nextInt(); if(input==0 || input>10) {   System.out.println("Input not in the range."); continue; } else if(input<0) { System.out.println("Input is negative. Program stopping..."); break; } else continue; }while(true); } public void sectionE() {   System.out.println(" Enter a number in the range 3-9 : "); input=console.nextInt(); for(int i=1; i<=input; i++) { for(int j=1; j<=i; j++) System.out.print(j);   System.out.println(); } } public static void main (String[] args) { Ideone in = new Ideone(); in.sectionD(); in.sectionE(); } } Success 0.09s 380608KB stdin :
5
11
-1

6

 stdout :
Enter a number in the range 1-10, or enter a negative number to stop:
Enter a number in the range 1-10, or enter a negative number to stop:
Input not in the range.
Enter a number in the range 1-10, or enter a negative number to stop:
Input is negative. Program stopping... 

6

 stdout :
Enter a number in the range 1-10, or enter a negative number to stop:
Enter a number in the range 1-10, or enter a negative number to stop:
Input not in the range.
Enter a number in the range 1-10, or enter a negative number to stop:
Input is negative. Program stopping... 

Enter a number in the range 3-9 :  1 12 123 1234 12345
123456  

Enter a number in the range 3-9 :  1 12 123 1234 12345
123456  

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