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Mystery Number in C#

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In this tutorial, we will write a c# program to check if a number is a Mystery Number. Before that, we may go through the following topic in c#.

A mystery number is a number that can be expressed as the sum of two numbers and those two numbers should be the reverse of each other. It lies between 22 to 198, i.e. 22<=N<=198.

Example:

132 = 93+39
154 = 68 + 86
176 = 79 + 97

Program to check Mystery Number in C#

using System;

class MysteryNumber
{
    static int reverseNum(int x)
    {
        string s = x.ToString();
        string str="";
        for(int i=s.Length-1;i>=0;i--)
        {
             
            str=str+s[i];
        }
         
        int rev=Int32.Parse(str);
        return rev;
    }
     
    static bool isMysteryNumber(int n)
    {
        for (int i=1; i <= n/2; i++)
        {
            int j = reverseNum(i);
            if (i + j == n)
            {
                Console.WriteLine( i + " " + j);
                Console.WriteLine("It is a Mystery Number");
                return true;
            }
        }
     
        Console.WriteLine("It is not a Mystery Number");
        return false;
    }
     
    public static void Main()
    {
        int n = 154;
        isMysteryNumber(n);
     
    }
 
}

Output:

59 95
It is a Mystery Number

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