Question

How to find the first occurrence of a pattern in a string from some starting position in C#

Answer 1

using System;

class Program
{
    static void Main()
    {
        string str = "abcdefgaaahijklaaaamnopqaaaaarst";
        string pattern = "aaa";
        int startPosition = 11; // Starting position to search from

        // Find the first occurrence of the pattern starting from the given position
        int foundPosition = str.IndexOf(pattern, startPosition);

        if (foundPosition != -1) {
            Console.WriteLine($"Pattern found at position: {foundPosition}");
        }
        else {
            Console.WriteLine("Pattern not found!");
        }
    }
}



/*
run:

Pattern found at position: 15

*/

 

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