#1,013 – default Operator Returns Default Values

The default operator can be used to determine the default value for any type.  It returns values as follows:

  • For value types – the result of zeroing out the contents of the variable
    • Numeric types – zero
    • bool type – false
    • char type – null character
    • struct types – all fields defaulted
  • For reference types – null

Here are some examples:

            int n1 = default(int);          // 0
            double d1 = default(double);    // 0.0
            bool b1 = default(bool);        // false
            char c1 = default(char);        // \0
            string s1 = default(string);    // null
            Dog d = default(Dog);           // null  (ref type)
            Point3D p1 = default(Point3D);  // X=0.0, Y=0.0, Z=0.0, Name=null



About Sean
Software developer in the Twin Cities area, passionate about .NET technologies. Equally passionate about my own personal projects related to family history and preservation of family stories and photos.

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