Remove last word from string C#.Net [Add a Word to the End of a String in C#.NET]

In this C#.Net tutorial, we will be exploring how to remove the last word from a string in C#.NET. Also, we will see, how to add a word to the end of a string in C#.Net.

Remove the last word from string C#.Net

For this example, I have used visual studio 2022 and C#.Net as language.

Steps to Remove the Last Word from a String

Step 1: Define the String

First, you need to define the string from which you want to remove the last word. In this case, let’s use the name of a city in the USA.

string cityName = "San Francisco California";

Step 2: Find the Index of the Last Space

The next step is to find the position of the last space in the string. We assume that words are separated by spaces. In C#, you can use the LastIndexOf() method to achieve this.

int lastSpaceIndex = cityName.LastIndexOf(' ');

This will return the index of the last space in the string. If no space is found, it will return -1.

Step 3: Remove the Last Word

Now that you have the index of the last space, you can remove the last word from the string. You can use the Substring() method in C# to extract a part of the string.

if (lastSpaceIndex != -1) // if a space was found
{
    cityName = cityName.Substring(0, lastSpaceIndex);
}

This will remove the last word from the string.

Full Code Example

Here’s the full code example:

string cityName = "San Francisco California";

int lastSpaceIndex = cityName.LastIndexOf(' ');

if (lastSpaceIndex != -1) // if a space was found
{
    cityName = cityName.Substring(0, lastSpaceIndex);
}

Console.WriteLine(cityName);

When you run this code, it will output: San Francisco.

You can see the image below:

Now, you should now be able to remove the last word from any string in C#.NET. Remember, this assumes that words are separated by spaces. If you have a different word separator, you would need to adjust the code accordingly.

Add a Word to the End of a String in C#.NET

Now, let us see, how to add a word to the end of a string in C#.net.

You should have a development environment for C# and some basic knowledge of C# syntax and string manipulation.

Step 1: Define the String

First, you need to define the string to which you want to add a word. As before, we’ll use a city name from the USA as an example.

string cityName = "San Francisco";

Step 2: Define the Word to Add

Next, define the word you want to add to the end of the string.

string stateName = "California";

Step 3: Add the Word to the String

Now you can add the word to the string. In C#, you can use the + operator or the Concat() method to achieve this.

// Using the + operator
cityName = cityName + " " + stateName;

// Or using the Concat() method
cityName = string.Concat(cityName, " ", stateName);

Both of these methods will append the state name to the city name with a space in between.

Full Code Example

Here’s the full code example that I have run in a C#.net console application.

string cityName = "San Francisco";
string stateName = "California";

// Using the + operator
cityName = cityName + " " + stateName;

// Or using the Concat() method
cityName = string.Concat(cityName, " ", stateName);

Console.WriteLine(cityName);

Here you can see the output below:

Conclusion

In this C#.Net tutorial, we have discussed how to remove the last word from a string c#.net and also I have explained how to add a word to the end of a string in C#.net.

You may also like the following C#.Net tutorials:

• Convert String to Int Without Parse in C#.Net
• How to remove first and last character from string using C#.net?
• Convert String to DateTime in C#.NET