how to reverse a words in a string using c# programming?

Question

I want reverse words in a string. I am not getting proper output. Please help me.

Example

input: Hello world
output: World Hello

Code:

class Program
{
    static void Main(string[] args)
    {
        Console.WriteLine("Enter a string");
        string s1 = Console.ReadLine();           
        string s2 = "";
        int l = s1.Length;

        for (int i = l - 1; i >= 0; i--)
        {
            s2 = s2 + s1[i];
        } 
        for (int i = 0; i<s2.Length; i++)
        {
            if (s2[i] == ' ')
            {
                for(int j=i;j>0 && s2[j]!=' ';j--)
                   Console.Write(s2[j1]);
                   Console.Write(" ");
            }
            else if (i == s2.Length - 1)
            {
                for (int j = i+1; j > 0 && s2[j] != ' '; j--)
                    Console.Write(s2[j]);
                Console.Write(" ");
            }                   
        }
    }
}

Take the input, split the string in an array using the space as separator, then iterate it in reverse, from end to begin. Easy, isn't it? ;-) — Oscar, Aug 09 '16 at 10:34
I think it is esier if you split the string by blanks and then reverse the output array — DerApe, Aug 09 '16 at 10:35
See this demo [Reverse String](https://dotnetfiddle.net/XD34C9) :) — Raktim Biswas, Aug 09 '16 at 10:40

score 4 · Answer 1 · edited Aug 09 '16 at 10:42

4

Easiest appraoch would be to split the word at its boundaries and then use IEnumerable<T>.Reverse():

var words = myString.Split(' ');
var result = words.Reverse();

To combine it all into one string:

var resultString = String.Join(" ", result);

The final one-liner:

var result = String.Join(" ", myString.Split(' ').Reverse());

edited Aug 09 '16 at 10:42

Raktim Biswas

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answered Aug 09 '16 at 10:37

MakePeaceGreatAgain

35,491
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1

and then String.Join(" ", result); to rebuild the string – Ivan Aug 09 '16 at 10:38
and it should be `words.Reverse()`. – Rumesh Eranga Hapuarachchi Aug 09 '16 at 10:39
1

@IvanSignore Yeap, updated. – MakePeaceGreatAgain Aug 09 '16 at 10:39

score -1 · Answer 2 · answered Aug 09 '16 at 10:35

-1

Just use the built-in Linq method:

Console.WriteLine("Please input string");
string input = Console.ReadLine();
string reversed = string.Join(" " , input.Split(' ').Reverse());

answered Aug 09 '16 at 10:35

MichaelThePotato

1,523
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Didn't notice you wanted to reverse the word order and not the characters. Fixed it, it fits your goals now. – MichaelThePotato Aug 09 '16 at 10:40
happy to help! upvote me if you liked it :D – MichaelThePotato Aug 09 '16 at 10:55

how to reverse a words in a string using c# programming?

2 Answers2