Java finding a missing number problem

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Hello guys,
There is a problem about java i need to solve. The user provides a string which has numbers in it. One of the numbers is missing. The first and the last number can be between -9999 and 9999 and the difference can be between -99 and 99. My program should print the missing number.
Here are some examples:

510152030
25

567566565564563562561560559557556555554
558

828588919497100103106112115118121
109

-45-35-25-55152535455565
-15

I only have a basic knowledge in java.( while,for,if)
I don't want to use break,continue,switch

I would appreciate your help...

What I have tried:

I could not try anything because my code gets too long.

Posted 11-Feb-19 4:40am

Member 14048022

Updated 11-Feb-19 5:22am

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Comments

OriginalGriff 11-Feb-19 11:15am

We are more than willing to help those that are stuck: but that doesn't mean that we are here to do it all for you! We can't do all the work, you are either getting paid for this, or it's part of your grades and it wouldn't be at all fair for us to do it all for you.

So we need you to do the work, and we will help you when you get stuck. That doesn't mean we will give you a step by step solution you can hand in!
Start by explaining where you are at the moment, and what the next step in the process is. Then tell us what you have tried to get that next step working, and what happened when you did.

Member 14048022 11-Feb-19 11:26am

Hello,
My problem is that i can't find a starting point.
Thank you for your response.

Richard MacCutchan 11-Feb-19 11:53am

The starting point is to decide how you can identify the missing number. From your examples above it is not obvious.

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Maciej Los · Answer 1 · 2019-02-11T05:22:00

Solution 1

Google[^] is your friend!

First result: Find the Missing Number - GeeksforGeeks[^]

[EDIT]
For missing numbers in string, check this: Find the missing number in a string of numbers with no separator - GeeksforGeeks[^]

Posted 11-Feb-19 5:22am

Maciej Los

Updated 11-Feb-19 5:31am

v2

Comments

Member 14048022 11-Feb-19 11:27am

Hello,
There are no arrays in my question. However, thank you for responding.

Maciej Los 11-Feb-19 11:29am

Find the missing number in a string of numbers with no separator - GeeksforGeeks[^]

CPallini 11-Feb-19 15:46pm

5.

Maciej Los 11-Feb-19 16:21pm

Thank you, Carlo.