C# get the last element that run through foreach loop

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In this program, I have a foreach loop that will print out the array. However, I just want to take the last loop as the result that run thorugh the foreach loop.

Current result showed:

h,
h, e,
h, e, l,
h, e, l, l,
h, e, l, l, o,

What should I try if I only want the result show the last one which is h, e, l, l, o ?

What I have tried:

char[] myList = { 'h', 'e', 'l', 'l', 'o' };
string list = string.Empty;
foreach (char c in myList)
{
    //Console.WriteLine(c);
    list += c + ", ";
    Console.WriteLine(list);
}

Posted 4-Jul-22 21:10pm

Member 14771626

Updated 5-Jul-22 4:32am

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Richard MacCutchan · Answer 1 · 2022-07-04T22:08:00

Solution 2

Move the WriteLine outside the loop:

C#

char[] myList = { 'h', 'e', 'l', 'l', 'o' };
string list = string.Empty;
foreach (char c in myList)
{
    list += c + ", ";
}
Console.WriteLine(list);

Posted 4-Jul-22 22:08pm

Richard MacCutchan

Comments

CPallini 5-Jul-22 7:40am

5.

Richard MacCutchan 5-Jul-22 9:34am

Thank you, the most challenging problem today. :)

OriginalGriff · Answer 2 · 2022-07-04T21:43:00

You need nested for loops: an outer one which prints each row running from 0 to the array Length minus one as y, and an inner one which runs from 0 to y as x.
Inside the inner array, print each character with Console.Write using x as an index into the array.
After each time the inner loop finishes, print a new line.

Think about it for a couple of minutes, and you'll get the idea.
If you are having problems getting started at all, then this may help: How to Write Code to Solve a Problem, A Beginner's Guide[^]

Patrice T · Answer 3 · 2022-07-05T01:23:00

Your code do not behave the way you expect, or you don't understand why !

There is an almost universal solution: Run your code on debugger step by step, inspect variables.
The debugger is here to show you what your code is doing and your task is to compare with what it should do.
There is no magic in the debugger, it don't know what your code is supposed to do, it don't find bugs, it just help you to by showing you what is going on. When the code don't do what is expected, you are close to a bug.
To see what your code is doing: Just set a breakpoint and see your code performing, the debugger allow you to execute lines 1 by 1 and to inspect variables as it execute.

Debugger - Wikipedia, the free encyclopedia[^]

Mastering Debugging in Visual Studio 2010 - A Beginner's Guide[^]
Basic Debugging with Visual Studio 2010 - YouTube[^]

Debugging C# Code in Visual Studio - YouTube[^]

The debugger is here to only show you what your code is doing and your task is to compare with what it should do.

George Swan · Answer 4 · 2022-07-05T04:32:00

Solution 4

There is no need for a foreach loop. Just create a new string.

C#

char[] myList = { 'h', 'e', 'l', 'l', 'o' };
Console.WriteLine(new string(myList));

Posted 5-Jul-22 4:32am

George Swan

Comments

Richard MacCutchan 5-Jul-22 11:03am

It is after all a rather pointless exercise. :)

George Swan 5-Jul-22 11:54am

Indeed it is. I suspect that the OP did not know that the string class had a constructor that took a character array.

Dave Kreskowiak 5-Jul-22 13:50pm

Or this is a homework assignment covering foreach...

George Swan 5-Jul-22 13:57pm

A good point, Dave. I never thought of that, you could well be right.

C# get the last element that run through foreach loop

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C# get the last element that run through foreach loop

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