How to remove first 10 characters from a string?

Question

How to ignore the first 10 characters of a string?

Input:

str = "hello world!";

Output:

d!

Answer 1

str = str.Remove(0,10); Removes the first 10 characters

or

str = str.Substring(10); Creates a substring starting at the 11th character to the end of the string.

For your purposes they should work identically.

Answer 2

str = "hello world!";
str.Substring(10, str.Length-10)

you will need to perform the length checks else this would throw an error

Answer 3

Substring is probably what you want, as others pointed out. But just to add another option to the mix...

string result = string.Join(string.Empty, str.Skip(10));

You dont even need to check the length on this! :) If its less than 10 chars, you get an empty string.

Answer 4

Substring has two Overloading methods:

public string Substring(int startIndex);//The substring starts at a specified character position and continues to the end of the string.

public string Substring(int startIndex, int length);//The substring starts at a specified character position and taking length no of character from the startIndex.

So for this scenario, you may use the first method like this below:

var str = "hello world!";
str = str.Substring(10);

Here the output is:

d!

If you may apply defensive coding by checking its length.

Answer 5

The Substring has a parameter called startIndex. Set it according to the index you want to start at.

Answer 6

You Can Remove Char using below Line ,

:- First check That String has enough char to remove ,like

   string temp="Hello Stack overflow";
   if(temp.Length>10)
   {
    string textIWant = temp.Remove(0, 10);
   }

Answer 7

Starting from C# 8, you simply can use Range Operator. It's the more efficient and better way to handle such cases.

string AnString = "Hello World!";
AnString = AnString[10..];

Answer 8

Use substring method.

string s = "hello world";
s=s.Substring(10, s.Length-10);

Answer 9

There is no need to specify the length into the Substring method. Therefore:

string s = hello world;
string p = s.Substring(3);

p will be:

"lo world".

The only exception you need to cater for is ArgumentOutOfRangeException if startIndex is less than zero or greater than the length of this instance.

Answer 10

Calling SubString() allocates a new string. For optimal performance, you should avoid that extra allocation. Starting with C# 7.2 you can take advantage of the Span pattern.

When targeting .NET Framework, include the System.Memory NuGet package. For .NET Core projects this works out of the box.

static void Main(string[] args)
{
    var str = "hello world!";
    var span = str.AsSpan(10); // No allocation!

    // Outputs: d!
    foreach (var c in span)
    {
        Console.Write(c);
    }

    Console.WriteLine();
}

Answer 11

You can use the method Substring method that takes a single parameter, which is the index to start from.

In my code below i deal with the case were the length is less than your desired start index and when the length is zero.

string s = "hello world!";
s = s.Substring(Math.Max(0, Math.Min(10, s.Length - 1)));

Answer 12

For:

var str = "hello world!";

To get the resulting string without the first 10 characters and an empty string if the string is less or equal in length to 10 you can use:

var result = str.Length <= 10 ? "" : str.Substring(10);

or

var result = str.Length <= 10 ? "" : str.Remove(0, 10);

First variant being preferred since it needs only one method parameter.