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Trim method of string in C# Explained

Trim method of string in C#

The string Trim method is used to remove all trailing and leading whitespace characters from the specified string object.

 

By using the Trim() method, we can also remove all occurrences of specified characters from the start and end of the current string.

 

Trim Method Syntax

Following is the syntax of defining a string Trim method to remove all leading and trailing whitespaces or specified characters from the string object.

 

public string Trim()

public string Trim(char[] trimChars)

 

From the above syntaxes, the first syntax is used to remove all whitespaces from the starting and end of the specified string and it won’t take any parameters.

 

The second syntax is used to remove trailing and leading occurrences of specified characters in an array from the current string object.

 

Trim() Method Example

Following is the example of using the string Trim() method to remove the starting and ending of whitespaces or specified characters from the string object.

 

using System;

namespace CsharpnaijaTutorial

{

    class Program

    {

        static void Main(string[] args)

        {

            // Trim Whitespaces

            string str1 = "  Welcome";

            string str2 = "    to    ";

            string str3 = "    Csharpnaija";

            Console.WriteLine($"Before Trim: {str1} {str2} {str3}");

            Console.WriteLine($"After Trim: {str1.Trim()} {str2.Trim()} {str3.Trim()}");

            char[] trimChars = { '*', '@', ' ' };

            // Trim with Characters

            string str4 = "@@**  Musa Sule  **@";

            Console.WriteLine($"Before Trim: {str4}");

            Console.WriteLine($"After Trim: {str4.Trim(trimChars)}");

            Console.WriteLine("\nPress Enter Key to Exit..");

            Console.ReadLine();

        }

    }

}

 

 

From the above example, we can noticed that we used a string Trim() method with or without characters to remove all leading and trailing whitespaces and defined characters from the string object.

 

When you execute the above program, you will get the result as shown below.

 




 
TrimStart() Method

The Trim() method will remove all trailing and leading whitespaces or defined characters from the current string object. In case, if we want to remove only trailing or starting occurrences of whitespaces or characters from the string, then we need to use TrimStart() method.

 

The string TrimStart() method is used to remove all trailing occurrences of whitespaces or specified characters in an array from the string object.

 

The below code snippets demonstrate the use of TrimStart() method to remove all trailing or starting occurrences of whitespaces or specified characters from the string object.

 

using System;

namespace CsharpnaijaTutorial

{

    class Program

    {

        static void Main(string[] args)

        {

            // Trim Whitespaces

            string str1 = "  Welcome";

            string str2 = "    to    ";

            string str3 = "    Csharpnaija";

            Console.WriteLine($"Before Trim: {str1} {str2} {str3}");

            Console.WriteLine($"After Trim: {str1.TrimStart()} {str2.TrimStart()} {str3.TrimStart()}");

            char[] trimChars = { '*', '@', ' ' };

            // Trim with Characters

            string str4 = "@@**  Musa Sule  **@";

            Console.WriteLine($"Before Trim: {str4}");

            Console.WriteLine($"After Trim: {str4.TrimStart(trimChars)}");

            Console.WriteLine("\nPress Enter Key to Exit..");

            Console.ReadLine();

        }

    }

}

 

If you observe above example, we used a TrimStart() method to remove all trailing occurrences of whitespaces and specified characters in string object.

 

When you execute the above program, we will get the result as shown below.

 

trim Start


 

TrimEnd() Method

The Trim() method will remove all trailing and leading whitespaces or defined characters from the current string object. In case, if we want to remove only leading or ending occurrences of whitespaces or characters from the string, then we need to use TrimEnd() method.

 

The string TrimEnd() method is used to remove all leading or ending occurrences of whitespaces or specified characters in an array from the string object.

 

The code below is an example of using the TrimEnd() method to remove all leading or ending occurrences of whitespaces or specified characters from the string object.

 

namespace CsharpnaijaTuturial

{

    class Program

    {

        static void Main(string[] args)

        {

            // Trim Whitespaces

            string str1 = "  Welcome   ";

            string str2 = "    to  ";

            string str3 = "    Csharpnaija  ";

            Console.WriteLine($"Before Trim: {str1} {str2} {str3}");

            Console.WriteLine($"After Trim: {str1.TrimEnd()} {str2.TrimEnd()} {str3.TrimEnd()}");

            char[] trimChars = { '*', '@', ' ' };

            // Trim with Characters

            string str4 = "@@**  Musa Sule  **@";

            Console.WriteLine($"Before Trim: {str4}");

            Console.WriteLine($"After Trim: {str4.TrimEnd(trimChars)}");

            Console.WriteLine("\nPress Enter Key to Exit..");

            Console.ReadLine();

        }

    }

}

 

If you observe above example carefully, we used a TrimEnd() method to remove all leading occurrences of whitespaces and specified characters in string object.

 

When you execute the above c# program, we will get the result as shown below.

 


 

 

Thank you

 

References

1.     Tutlane

2.     Geeksforgeek


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