FAQ: Method Output - Out

This community-built FAQ covers the “Out” exercise from the lesson “Method Output”.

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Here’s my answer

using System;

namespace OutParameters
  class Program
    static void Main(string[] args)
      string ageAsString = "102";
      string nameAsString = "Granny";
      int ageAsInt;
      bool outcome;
      outcome = Int32.TryParse(ageAsString, out ageAsInt);
      int nameAsInt;
      bool outcome2;
      outcome2 = Int32.TryParse(nameAsString, out nameAsInt);

So should Granny be null or 0 when printing

int cannot be null unless made nullable (int?). So it will have to have a value that isn’t null. The default for int is 0, so it will be 0.

Oh ok thanks. I’m guessing the narrative may be wrong for this section. It has example code saying:

int number2;
bool success2 = Int32.TryParse(" !!! ", out number2);
// number2 is null and success2 is false

but number 2 would be 0 not null right?

Yes, it would be 0 not null.

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