Question

How to check if a string starts with a substring from a list of substrings in C#

Answer 1

using System;
using System.Collections.Generic;

class Program
{
    // Function to check if the string str starts with any substring from the list
    static bool StartsWithAny(string str, List<string> substrings) {
        foreach (var substring in substrings) {
            // Check if the string str starts with the current substring
            if (str.StartsWith(substring)) {
                return true;
            }
        }
        return false; // Return false if no substring matches
    }

    static void Main()
    {
        string str = "abcdefg";

        // List of substrings
        List<string> substrings = new List<string> { "xy", "poq", "mnop", "abc", "rsuvw" };

        // Check if the string str starts with any substring from the list
        if (StartsWithAny(str, substrings)) {
            Console.WriteLine("The string starts with a substring from the list.");
        }
        else {
            Console.WriteLine("The string does not start with any substring from the list.");
        }
    }
}



/*
run:

The string starts with a substring from the list.

*/

 

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