For loop in java not working

Question

import java.util.Random;
public class RandomHomework
{
    public static void main(String[] args)
    {
        int i;
        Random generator = new Random();
        double randomDecimals = generator.nextDouble()-.04;
        int randomNumber = generator.nextInt(9)+10;
        for(i = 0; i > 100; i++)
        {
            if(randomNumber >= 10.00)
            {
                System.out.println(randomNumber + randomDecimals);
            }
        }
    }
}

I am having a problem with the setup of my for loop and cannot figure it out... It runs perfectly fine when I remove the for loop.

As you can see I tried declaring the i previously but it made no difference.

Please post your code as an [MCVE](http://stackoverflow.com/help/mcve) and not as an external link. — Kevin Workman, Sep 09 '14 at 17:11
After you fix your for loop, your program still won't work since it will either skip over printing the `randomNumber` 100 times, or print the same `randomNumber` 100 times. You presumably wanted to generate a new random number inside the loop body? — David Conrad, Sep 09 '14 at 18:27
Also, since you're adding 10 to it, `randomNumber` will always be greater than or equal to 10. You're generating numbers in the range 10 - 18 (inclusive). — David Conrad, Sep 09 '14 at 18:29

score 12 · Answer 1 · answered Sep 09 '14 at 17:11

12

for(i = 0; i > 100; i++)

This says: start with i set to zero and continue as long as it is greater than 100.

This stops right away

answered Sep 09 '14 at 17:11

laune

31,114
3
29
42

score 3 · Answer 2 · answered Sep 09 '14 at 17:13

3

The problem is the condition of the loop

for(i = 0; i > 100; i++)

The condition should be i < 100

answered Sep 09 '14 at 17:13

viczap

194
2
12

score 1 · Answer 3 · answered Sep 09 '14 at 17:12

1

Your loop condition is always false. You start from i = 0 and say run while i > 100. However, 0 is never > 100 so your loop never happens.

Change

for(i = 0; i > 100; i++)

To

for(i = 0; i < 100; i++)

answered Sep 09 '14 at 17:12

nem035

34,790
6
87
99

score 1 · Answer 4 · answered Sep 09 '14 at 17:14

1

You must change:

for(i = 0; i > 100; i++)

to:

for(i = 0; i < 100; i++)

for the loop to execute.

answered Sep 09 '14 at 17:14

drage0

372
3
8

score 0 · Answer 5 · edited May 16 '16 at 10:08

0

You should use

for(i = 0; i < 100; i++)

instead of

for(i = 0; i > 100; i++)

else it would end as soon as it starts since you are checking i > 100

edited May 16 '16 at 10:08

Community

1
1

answered Sep 09 '14 at 17:12

Rahul Tripathi

168,305
31
280
331

score -1 · Answer 6 · answered Sep 09 '14 at 18:50

-1

You need to use for(i =0; i<100; i++) cuz your version is ended right away

answered Sep 09 '14 at 18:50

wwood

489
6
19

For loop in java not working

6 Answers6