Stopping a Loop

I have a function that takes the sum of 1/n/(n+1). I want my loop to keep adding the numbers together UNTIL the difference between consecutive numbers is less than or equal to 0.0000001. I have no idea how to tell the loop to look at only the difference between consecutive numbers, not just the number itself. Does anyone know how to tell a loop to stop in this case? Thanks!

A kind of fool proof method, but not very elegant way is to go

Code:

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while(1){

do something....

if (difference<=0.0000001) break;
}

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or better...

Code:

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do {

//do something....calculate sum and difference , increment n

} while((difference<=0.0000001); // not sure is you need a semicolon here but the compiler will advise!!

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I bet they produce pretty much the same code anyway!!

Quote:

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Originally Posted by Catman188

I have a function that takes the sum of 1/n/(n+1). I want my loop to keep adding the numbers together UNTIL the difference between consecutive numbers is less than or equal to 0.0000001. I have no idea how to tell the loop to look at only the difference between consecutive numbers, not just the number itself. Does anyone know how to tell a loop to stop in this case? Thanks!

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You can use while loop like this:

Code:

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while(delta >threshold)
{
    //update n
    //compute something
    //update delta
   
}

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