Calculator for more than two numbers
Using goto is not a good practice!!
Instead of using goto, use a do-while or a while loop. You want to do something as long as the answer to &quot;Do you want to continue&quot; is &quot;Yes&quot;. This is perfect for a do-while loop.
You should also avoid using goto overagain and instead use a for-loop to iterate through the array. It could also be solved with recursion. Use anything you want except the goto statement!

Make your code self-documenting. Your &quot;explanation&quot; of your code in the beginning of your question confuses me more than helps me.
Self-document your code by using proper variable names. s can be called input instead, and i and b can be called something that explains what they are doing. Right now, I can't exactly understand what they are supposed to do.

Your last block of Console.WriteLine(&quot;Do you want to continue?&quot;);, including the if-else that comes afterwards should be indented one step further.

If you don't have anything to do in else, just skip that part. if ... { ... } is enough, you don't need else. You'd better remove this, or else...

Use English names for variables, especially when characters outside the range of A-Z, a-z, 0-9, _ are included (such as &quot;ä&quot;). The Swedish word &quot;avgränsare&quot; translates to &quot;delimiter&quot; in English.