Reverse Each Word in a Given String in C#

In this article, I am going to discuss How to Reverse Each Word in a Given String in C# with some examples. Please read our previous article where we discussed How to Reverse a String in C# program with some examples. As part of this article, we are going to use the following three approaches to reverse each word in a given string C#.

1. Without using a built-in function
2. Using Stack
3. Using LINQ

Program Description:
The user will input a string and we need to reverse each word individually without changing its position in the string. Here, we will take the input as a string from the user, and then we need to reverse each word individually without changing their position in the sentence as shown in the below image.

Method1: Without using any built-in function:
In the following example, we generate all words separated by space. Then reverse the words one by one.

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using System; using System.Collections.Generic; using System.Text; namespace LogicalPrograms {     class Program     {         static void Main(string[] args)         {             Console.Write("Enter a String : ");             string originalString = Console.ReadLine();             StringBuilder reverseWordString = new StringBuilder();             List<char> charlist = new List<char>();             for (int i = 0; i < originalString.Length; i++)             {                 if (originalString[i] == ' ' || i == originalString.Length - 1)                 {                     if (i == originalString.Length - 1)                         charlist.Add(originalString[i]);                     for (int j = charlist.Count - 1; j >= 0; j--)                         reverseWordString.Append(charlist[j]);                     reverseWordString.Append(' ');                     charlist = new List<char>();                 }                 else                 {                     charlist.Add(originalString[i]);                 }                }             Console.WriteLine($"Reverse Word String : {reverseWordString.ToString()}");             Console.ReadKey();         }          } }

Output:

Method2: Using Stack to Reverse Each Word in C#
Here, we are using a stack to push all words before space. Then as soon as we encounter a space, we empty the stack. The program is self-explained, so please go through the comments line.

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using System; using System.Collections.Generic; namespace LogicalPrograms {     class Program     {         static void Main(string[] args)         {             Console.Write("Enter a String : ");             string originalString = Console.ReadLine();             Stack<char> charStack = new Stack<char>();             // Traverse the given string and push all characters             // to stack until we see a space.              for (int i = 0; i < originalString.Length; ++i)             {                 if (originalString[i] != ' ')                 {                     charStack.Push(originalString[i]);                 }                 // When seeing a space, then print contents of the stack.                  else                 {                     while (charStack.Count > 0)                     {                         Console.Write(charStack.Pop());                     }                     Console.Write(" ");                 }             }             // Since there may not be space after last word.              while (charStack.Count > 0)             {                 Console.Write(charStack.Pop());             }                           Console.ReadKey();         }          } }

Method3: Using Linq to Reverse Each Word in C#

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using System; using System.Linq; namespace LogicalPrograms {     class Program     {         static void Main(string[] args)         {             Console.Write("Enter a String : ");             string originalString = Console.ReadLine();                           string reverseWordString = string.Join(" ", originalString             .Split(' ')             .Select(x => new String(x.Reverse().ToArray())));             Console.WriteLine($"Reverse Word String : {reverseWordString}");             Console.ReadKey();         }          } }

Output:

Code Explanation:
Split the input string using a single space as the separator.

The Split method is used for returning a string array that contains each word of the input string. We use the Select method for constructing a new string array, by reversing each character in each word. Finally, we use the Join method for converting the string array into a string.

In the next article, I am going to discuss How to Remove Duplicate Characters from a given string in C# using different mechanisms. I hope now you understood How to Reverse Each Word in a Given String in C# with different mechanisms.

Summary:
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