Question

How would like to to compare values in this nested foreach.
I want to compare and if they match print YES for example.
Cheers

using System;

class Program
{
    static void Main()
    {
        // Use a string array to loop over.
        string[] ferns =
        {
            "apple",
            "Equisetopsida",
            "Marattiopsida",
            "Polypodiopsida"
        };

        string[] fruits=
        {
            "apple",
            "mango",
            "Marattiopsida",
            "Polypodiopsida"
        };
        // Loop with the foreach keyword.
        foreach (string value in ferns)
        {
            Console.WriteLine(value);

            foreach (string value in fruits)
            {
                Console.WriteLine(value);
            }

            //I would like to compare values here.
            //Compare frens values against fruits values.
            //How can i achieve this


        }
    }
}

Answer 1

first of all, in each of yours foreach, current element has this same name, and you will not be able to reach botch of them in second foreach.

To compare two string, you can use String.Compare method. For example:

foreach (string fern in ferns)
{

    foreach (string fruit in fruits)
    {
        if(String.Compare(fern,fruit,false)==0)
        {
             Console.WriteLine("YES");
        }
    }


}