Looking for a bit of help with a school assignment

[cab11150904]

I am trying to figure out the math of this and I can't seem to get it. Anyone have any idea? Also how do I set the title of the pop up to say input required? I am using vb.net.

[RedSphyxis]

First of all it would be helpful if you gave us what language you're using.

[cab11150904]

First of all it would be helpful if you gave us what language you're using.

See edit.

[madknight3]

You need to give more information on what you're having trouble with. Why is the math giving you trouble? Show us your code so we can see what you've tried and where you might be going wrong.

[r3bify]

I'll give you some pseudo code to start you off.

 

Get the number from the user

-> Is it negative?

-->Yes:

--->Throw an error

--->stop.

-->No

--->Continue.

 

Add all the numbers between one and the input number up.

int sum = 0;for(int i=0; i<=chosenNumber; i++)    sum += i;

You'll need something like that.

[Satlen]

Edit: Take number and inside of a loop, add the value to another int and then subtract 1 from the input value.