Question

How to find the index of Nth occurrence of a character in a string with C#

Answer 1

using System;

public class Program
{
    public static int GetNthIndexOfCh(string s, char ch, int n) {
        int count = 0;

        for (int i = 0; i <= s.Length - 1; i++) {
            if (s[i] == ch) {
                count += 1;
                if (count == n)
                    return i;
            }
        }

        return -1;
    }


    public static void Main(string[] args)
    {
        string str = "java c++ python c# javascript";

        Console.WriteLine(GetNthIndexOfCh(str, 'a', 3));
    }
}
 
   
   
/*
run:
   
20
   
*/

 

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