Need help with a loop

[ReV13]

Hi, Im pretty inexperienced with java and have run into a bit of a problem.

Basically i need to make a loop starting with -10 that prints out a value after 0.1; 0,11; 0,12; 0,13 etc. until it reaches 10.

thx

[miss.meli]

that prints out a value after 0.1; 0,11; 0,12; 0,13 etc. until it reaches 10.

I understand how you want to loop to go from -10 to 10 but I think I'm still confused on how you want it incremented.

Meli

[Eranga]

You say that you want to print decimal values?

[beginner21]

right,
i can't understand what you want to achieve..

[serjant]

Maybe you meant this:

               double num=0.1D;
		for(int i=-10;i<=10;i++){
                        System.out.println(num);
			num+=0.01D;
			
		}

[Eranga]

There are lots of ways to do that, but not much clear what our thread starter wants.

[ReV13]

Sorry, I tried to be as clear as I could but im kinda new to java terminology (english isnt my native language eighter):P

Anyways after being stuck for a week, i finally came up with this :

int num = -1;
ArrayList <Double> v = new ArrayList<Double>();

for(double n = 0.1; n < 5;n = n + 0.01 ){
v.add(n);
}

for (double i = -10; i <= 10; i = i + v.get(num)) {
num = num + 1;
System.out.println(i);
}

any ways this could be done simpler?

[CJSLMAN]

Let's see...

• The first for statement is to populate 5 elements in the v arraylist
• The second for statement... I have no clue what this is supposed to do. To begin with, it won't compile... v.get(-1) will make the compiler upchuck big time.
• What do you want to do with the second for statement? Print the values of the arraylist?

Luck,
CJSL

[ReV13]

dno, the code works perfectly in eclipse

[beginner21]

for (double i = -10; i <= 10; i = i + v.get(num)) {
num = num + 1;
System.out.println(i);
}

what does the second for loop prints?

[ReV13]

The first loop is to make a "step" to get the second loop running properly. Second one is to print out the actual values I need(-10; -9.9; -9.790...01; -9.670...02; etc.)

[beginner21]

is your program prints what you want?

[CJSLMAN]

Let's see...

• You don't know what the second for loop's task is
• ... and you say it's working perfectly... huh... then what is this post for?

If you want help, please explain the problem you're having, because it would appear that you want help for something that is working correctly and you don't have a clue as to how it works.

CJSL

[CJSLMAN]

Independently of the questions and doubts stated in the above posts, I would like to correct a statements that I made:

To begin with, it won't compile... v.get(-1) will make the compiler upchuck big time.

The code would probably compile, but would it fail at run time... and the program is the one that would upchuck.
Sorry if this caused any misunderstandings (haven't had my morning coffee yet).
Clarification: the above questions/doubts still stand.

CJSL

[ReV13]

Basically, I managed to come up with a working (tho crude) solution to my problem after I made this thread.

I was just wondering if I could simplify the code. Thx for the help.

[CJSLMAN]

int num = -1

Why is int Num initialized to -1? Try making it equal to zero.. that may be what you are looking for.

Luck,
CJSL