How to take two values from list?

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Hi,
I have a List<int> with [0,4,6,8,9,11,14...] and I would like to always get two consecutive values in a loop. For example, the value 0;4 then 4;6 followed by 6;8 and so on until the end.

What I have tried:

Does anyone know how to write it, for example, for a For cycle? Or any other cycle?
Thank you in advance for your reply

David

Posted 29-Nov-22 22:33pm

dejf111

Updated 29-Nov-22 22:51pm

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2 solutions

Solution 2

The loop is quite straightforward. You start from index zero and take two values. You then increment the index value and check that it does not point to the very last entry. If it does then there is only one number left, if it does not, then you have at least two still left. So repeat the above until you find the last entry, or there are no more items in the list.

C#

for (int i = 0; i < list.Count; ++i) { if (i == list.Count - 1) // the last item break; // list[i] and list[i + 1] are the next two items }

OriginalGriff's solution above is even more straightforward.

Posted 29-Nov-22 22:51pm

Richard MacCutchan

Updated 29-Nov-22 23:40pm

v2

Comments

Richard Deeming 30-Nov-22 5:11am

I prefer Griff's solution - modifying the end-point of the loop, rather than adding a test-and-break within the loop. :)

Richard MacCutchan 30-Nov-22 5:13am

My sample caters for an odd number of entries.

Richard Deeming 30-Nov-22 5:14am

So does solution 1. :)

Richard MacCutchan 30-Nov-22 5:15am

Ha ha, of course it does. :(

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This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

OriginalGriff · Accepted Answer · 2022-11-29T22:47:00

Solution 1

Try this:

C#

List<int> list = new List<int> { 0, 4, 6, 8, 9, 11, 14 };
for (int index = 0; index < list.Count - 1; index++)
    {
    Console.WriteLine($"{list[index]}, {list[index + 1]}");
    }
}

Posted 29-Nov-22 22:47pm

OriginalGriff

Comments

dejf111 30-Nov-22 5:06am

That's exactly it. Thank you.

OriginalGriff 30-Nov-22 6:38am

You're welcome!

How to take two values from list?

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How to take two values from list?