How to Remove the last char of String in C#?

Question

I have a numeric string, which may be "124322" or "1231.232" or "132123.00". I want to remove the last char of my string (whatever it is). So I want if my string is "99234" became "9923".

The length of string is variable. It's not constant so I can not use string.Remove or trim or some like them(I Think).

How do I achieve this?

`Please Read this carefully And then tell me this question is duplicate` [This is a duplicate](http://stackoverflow.com/questions/3573284/trim-last-character-from-a-string) — Jonesopolis, Oct 07 '13 at 18:17
Related: http://stackoverflow.com/questions/2776673/how-do-i-truncate-a-net-string — Shog9, Apr 06 '16 at 18:42
Possible duplicate of [Delete last char of string](http://stackoverflow.com/questions/7901360/delete-last-char-of-string) — Tor Klingberg, Aug 25 '16 at 16:05

score 81 · Accepted Answer · edited Oct 07 '13 at 18:20

81

YourString = YourString.Remove(YourString.Length - 1);

edited Oct 07 '13 at 18:20

Habib

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answered Oct 07 '13 at 18:15

amin

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1

The important point here is that we need to assign it back to the original string. I lost time because I did not notice it, so maybe helpful to someone else. – Onat Korucu Nov 29 '21 at 13:27

score 12 · Answer 2 · edited Mar 03 '14 at 10:06

12

var input = "12342";
var output = input.Substring(0, input.Length - 1);

or

var output = input.Remove(input.Length - 1);

edited Mar 03 '14 at 10:06

Irvin Dominin

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answered Oct 07 '13 at 18:18

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score 4 · Answer 3 · answered Oct 07 '13 at 18:18

4

newString = yourString.Substring(0, yourString.length -1);

answered Oct 07 '13 at 18:18

DFord

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score 2 · Answer 4 · edited Nov 02 '22 at 11:22

If this is something you need to do a lot in your application, or you need to chain different calls, you can create an extension method:

public static String TrimEnd(this String str, int count)
{
    return str.Substring(0, str.Length - count);
}

and call it:

string oldString = "...Hello!";
string newString = oldString.TrimEnd(1); //returns "...Hello"

or chained:

string newString = oldString.Substring(3).TrimEnd(1);  //returns "Hello"

score 0 · Answer 5 · answered Jun 12 '18 at 06:57

If you are using string datatype, below code works:

string str = str.Remove(str.Length - 1);

But when you have StringBuilder, you have to specify second parameter length as well.

That is,

string newStr = sb.Remove(sb.Length - 1, 1).ToString();

To avoid below error:

SB2

How to Remove the last char of String in C#?

5 Answers5