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:

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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

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