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use of out parameter in c#

Sushant Mishra102425-Aug-2017
i have little confujion in out keyword, where we use this, please give an example
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Updated on 25-Aug-2017
Sushant Mishra

Sushant Mishra

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Niraj Kumar Mishra

Niraj Kumar Mishra

25-Aug-2017
when you are want to return any value from any method then you are use return keyword. But return  keyword return only one value at a time.
Let see in Example:
using System;
 classProgram
 {    publicstaticvoid Main()
   {
      int result = 0;
      result = Add(10, 20);
      Console.WriteLine("Sum={0} ", result);
      Console.ReadKey();
   }
     publicstaticint Add(int FN, int SN)
   {
     return FN + SN;
   }
 }


in this example method Add  return a single value.
But at the same time i want to return more than one value from a method then return  not do this operation.
So, that place we use out keyword.
Because out keyword used when you want a method to return more than one value.
Let see in below example
Example: I have a method Calculate  and i want to it return two value first is Sum and second is Subtract of numbers
using System;
classProgram
{
   publicstaticvoid Main()
   {
       int Total = 0;
       int Subtract= 0;
       Calculate(10, 20, out Total, out Subtract);
       Console.WriteLine("Sum={0} &&Subtract={1}",Total,Subtract);
       Console.ReadKey();
   }
     publicstaticvoid Calculate(int FN,int SN,outint Sum,outint Subtract)
   {
       Sum = FN + SN;
       Subtract= FN - SN;
   }
}

OUTPUT:
answer 524392508072539

I hope you are understand this.

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