Question

1. Types of Parameters 1. ret 2. out 2. Demonstrate the use of ref and out parameters in a Method 3. Write your code as following: 1. Create and define two methods: 1. static void TestRef(ref int value) 2. static void TestOut(out int value) 2. Call the methods created above in your Main() 3. Declare and assign a variable int val1 = 111; 4. Call method TestRef(ref val1) 5. Call method TestOut(out val2) 6. Observe and interpret the compiler output and modify the code accordingly 7. Give your feedback or comments.

On C#. please snap from Visual Studio and explain each step.

Answer 1

Below is the solution:

out parameter must be assigned the value, but ref parameter cannot.

code:

using System;

namespace RefOutParameter
{
    class Program
    {
        static void Main(string[] args)
        {
            int val1 = 111; //declare variable
            int val2 = 222; //declare variable

            TestRef(ref val1); //call method to test the ref
          
            Console.WriteLine("Reference value is:"+val1); // val1=7

            TestOut(out val2); //call method to test the out
            Console.WriteLine("Out value is:" + val2); // val2=9
            Console.ReadKey();
        }

        static void TestRef(ref int value) //called method ref
        {
           // value = 100; //set the value
        }
        static void TestOut(out int value) //called method out
        {
            value = 101; //must be assigned value
        }
    }
}

sample output:

Reference value is:111
Out value is:101