Question

How to select random two consecutive digits from a number in C#

Answer 1

using System;

class Program
{
    static string GetRandomTwoDigits(int num) {
        string s = num.ToString();

        if (s.Length < 2) {
            return "Error: number must have at least 2 digits";
        }

        Random rand = new Random();
        int start = rand.Next(s.Length - 1); 

        return s.Substring(start, 2);
    }

    static void Main()
    {
        int num = 123456;
        string randomTwo = GetRandomTwoDigits(num);

        Console.WriteLine("Random two digits: " + randomTwo);
    }
}



/*
run:

Random two digits: 45

*/

 

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